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Network Working Group K. McCloghrie Request for Comments: 1213 Hughes LAN Systems, Inc. Obsoletes: RFC 1158 M. Rose Performance Systems International Editors March 1991 Management Information Base for Network Management of TCP/IP-based internets: MIB-II Status of this Memo This memo defines the second version of the Management Information Base (MIB-II) for use with network management protocols in TCP/IP- based internets. This RFC specifies an IAB standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "IAB Official Protocol Standards" for the standardization state and status of this protocol. Distribution of this memo is unlimited. Table of Contents 1. Abstract............................................... 2 2. Introduction .......................................... 2 3. Changes from RFC 1156 ................................. 3 3.1 Deprecated Objects ................................... 3 3.2 Display Strings ...................................... 4 3.3 Physical Addresses ................................... 4 3.4 The System Group ..................................... 5 3.5 The Interfaces Group ................................. 5 3.6 The Address Translation Group ........................ 6 3.7 The IP Group ......................................... 6 3.8 The ICMP Group ....................................... 7 3.9 The TCP Group ........................................ 7 3.10 The UDP Group ....................................... 7 3.11 The EGP Group ....................................... 7 3.12 The Transmission Group .............................. 8 3.13 The SNMP Group ...................................... 8 3.14 Changes from RFC 1158 ................. ............. 9 4. Objects ............................................... 10 4.1 Format of Definitions ................................ 10 5. Overview .............................................. 10 6. Definitions ........................................... 12 6.1 Textual Conventions .................................. 12 6.2 Groups in MIB-II ..................................... 13 6.3 The System Group ..................................... 13 SNMP Working Group [Page 1] RFC 1213 MIB-II March 1991 6.4 The Interfaces Group ................................. 16 6.5 The Address Translation Group ........................ 23 6.6 The IP Group ......................................... 26 6.7 The ICMP Group ....................................... 41 6.8 The TCP Group ........................................ 46 6.9 The UDP Group ........................................ 52 6.10 The EGP Group ....................................... 54 6.11 The Transmission Group .............................. 60 6.12 The SNMP Group ...................................... 60 7. Acknowledgements ...................................... 67 8. References ............................................ 69 9. Security Considerations ............................... 70 10. Authors' Addresses ................................... 70 1. Abstract This memo defines the second version of the Management Information Base (MIB-II) for use with network management protocols in TCP/IP- based internets. In particular, together with its companion memos which describe the structure of management information (RFC 1155) along with the network management protocol (RFC 1157) for TCP/IP- based internets, these documents provide a simple, workable architecture and system for managing TCP/IP-based internets and in particular the Internet community. 2. Introduction As reported in RFC 1052, IAB Recommendations for the Development of Internet Network Management Standards [1], a two-prong strategy for network management of TCP/IP-based internets was undertaken. In the short-term, the Simple Network Management Protocol (SNMP) was to be used to manage nodes in the Internet community. In the long-term, the use of the OSI network management framework was to be examined. Two documents were produced to define the management information: RFC 1065, which defined the Structure of Management Information (SMI) [2], and RFC 1066, which defined the Management Information Base (MIB) [3]. Both of these documents were designed so as to be compatible with both the SNMP and the OSI network management framework. This strategy was quite successful in the short-term: Internet-based network management technology was fielded, by both the research and commercial communities, within a few months. As a result of this, portions of the Internet community became network manageable in a timely fashion. As reported in RFC 1109, Report of the Second Ad Hoc Network Management Review Group [4], the requirements of the SNMP and the OSI SNMP Working Group [Page 2] RFC 1213 MIB-II March 1991 network management frameworks were more different than anticipated. As such, the requirement for compatibility between the SMI/MIB and both frameworks was suspended. This action permitted the operational network management framework, the SNMP, to respond to new operational needs in the Internet community by producing this document. As such, the current network management framework for TCP/IP- based internets consists of: Structure and Identification of Management Information for TCP/IP-based internets, RFC 1155 [12], which describes how managed objects contained in the MIB are defined; Management Information Base for Network Management of TCP/IP-based internets: MIB-II, this memo, which describes the managed objects contained in the MIB (and supercedes RFC 1156 [13]); and, the Simple Network Management Protocol, RFC 1098 [5], which defines the protocol used to manage these objects. 3. Changes from RFC 1156 Features of this MIB include: (1) incremental additions to reflect new operational requirements; (2) upwards compatibility with the SMI/MIB and the SNMP; (3) improved support for multi-protocol entities; and, (4) textual clean-up of the MIB to improve clarity and readability. The objects defined in MIB-II have the OBJECT IDENTIFIER prefix: mib-2 OBJECT IDENTIFIER ::= { mgmt 1 } which is identical to the prefix used in MIB-I. 3.1. Deprecated Objects In order to better prepare implementors for future changes in the MIB, a new term "deprecated" may be used when describing an object. A deprecated object in the MIB is one which must be supported, but one which will most likely be removed from the next version of the MIB (e.g., MIB-III). MIB-II marks one object as being deprecated: atTable SNMP Working Group [Page 3] RFC 1213 MIB-II March 1991 As a result of deprecating the atTable object, the entire Address Translation group is deprecated. Note that no functionality is lost with the deprecation of these objects: new objects providing equivalent or superior functionality are defined in MIB-II. 3.2. Display Strings In the past, there have been misinterpretations of the MIB as to when a string of octets should contain printable characters, meant to be displayed to a human. As a textual convention in the MIB, the datatype DisplayString ::= OCTET STRING is introduced. A DisplayString is restricted to the NVT ASCII character set, as defined in pages 10-11 of [6]. The following objects are now defined in terms of DisplayString: sysDescr ifDescr It should be noted that this change has no effect on either the syntax nor semantics of these objects. The use of the DisplayString notation is merely an artifact of the explanatory method used in MIB-II and future MIBs. Further it should be noted that any object defined in terms of OCTET STRING may contain arbitrary binary data, in which each octet may take any value from 0 to 255 (decimal). 3.3. Physical Addresses As a further, textual convention in the MIB, the datatype PhysAddress ::= OCTET STRING is introduced to represent media- or physical-level addresses. The following objects are now defined in terms of PhysAddress: ifPhysAddress atPhysAddress ipNetToMediaPhysAddress SNMP Working Group [Page 4] RFC 1213 MIB-II March 1991 It should be noted that this change has no effect on either the syntax nor semantics of these objects. The use of the PhysAddress notation is merely an artifact of the explanatory method used in MIB-II and future MIBs. 3.4. The System Group Four new objects are added to this group: sysContact sysName sysLocation sysServices These provide contact, administrative, location, and service information regarding the managed node. 3.5. The Interfaces Group The definition of the ifNumber object was incorrect, as it required all interfaces to support IP. (For example, devices without IP, such as MAC-layer bridges, could not be managed if this definition was strictly followed.) The description of the ifNumber object is changed accordingly. The ifTable object was mistaken marked as read-write, it has been (correctly) re-designated as not-accessible. In addition, several new values have been added to the ifType column in the ifTable object: ppp(23) softwareLoopback(24) eon(25) ethernet-3Mbit(26) nsip(27) slip(28) ultra(29) ds3(30) sip(31) frame-relay(32) Finally, a new column has been added to the ifTable object: ifSpecific which provides information about information specific to the media being used to realize the interface. SNMP Working Group [Page 5] RFC 1213 MIB-II March 1991 3.6. The Address Translation Group In MIB-I this group contained a table which permitted mappings from network addresses (e.g., IP addresses) to physical addresses (e.g., MAC addresses). Experience has shown that efficient implementations of this table make two assumptions: a single network protocol environment, and mappings occur only from network address to physical address. The need to support multi-protocol nodes (e.g., those with both the IP and CLNP active), and the need to support the inverse mapping (e.g., for ES-IS), have invalidated both of these assumptions. As such, the atTable object is declared deprecated. In order to meet both the multi-protocol and inverse mapping requirements, MIB-II and its successors will allocate up to two address translation tables inside each network protocol group. That is, the IP group will contain one address translation table, for going from IP addresses to physical addresses. Similarly, when a document defining MIB objects for the CLNP is produced (e.g., [7]), it will contain two tables, for mappings in both directions, as this is required for full functionality. It should be noted that the choice of two tables (one for each direction of mapping) provides for ease of implementation in many cases, and does not introduce undue burden on implementations which realize the address translation abstraction through a single internal table. 3.7. The IP Group The access attribute of the variable ipForwarding has been changed from read-only to read-write. In addition, there is a new column to the ipAddrTable object, ipAdEntReasmMaxSize which keeps track of the largest IP datagram that can be re-assembled on a particular interface. The descriptor of the ipRoutingTable object has been changed to ipRouteTable for consistency with the other IP routing objects. There are also three new columns in the ipRouteTable object, ipRouteMask ipRouteMetric5 ipRouteInfo SNMP Working Group [Page 6] RFC 1213 MIB-II March 1991 the first is used for IP routing subsystems that support arbitrary subnet masks, and the latter two are IP routing protocol-specific. Two new objects are added to the IP group: ipNetToMediaTable ipRoutingDiscards the first is the address translation table for the IP group (providing identical functionality to the now deprecated atTable in the address translation group), and the latter provides information when routes are lost due to a lack of buffer space. 3.8. The ICMP Group There are no changes to this group. 3.9. The TCP Group Two new variables are added: tcpInErrs tcpOutRsts which keep track of the number of incoming TCP segments in error and the number of resets generated by a TCP. 3.10. The UDP Group A new table: udpTable is added. 3.11. The EGP Group Experience has indicated a need for additional objects that are useful in EGP monitoring. In addition to making several additions to the egpNeighborTable object, i.e., egpNeighAs egpNeighInMsgs egpNeighInErrs egpNeighOutMsgs egpNeighOutErrs egpNeighInErrMsgs egpNeighOutErrMsgs SNMP Working Group [Page 7] RFC 1213 MIB-II March 1991 egpNeighStateUps egpNeighStateDowns egpNeighIntervalHello egpNeighIntervalPoll egpNeighMode egpNeighEventTrigger a new variable is added: egpAs which gives the autonomous system associated with this EGP entity. 3.12. The Transmission Group MIB-I was lacking in that it did not distinguish between different types of transmission media. A new group, the Transmission group, is allocated for this purpose: transmission OBJECT IDENTIFIER ::= { mib-2 10 } When Internet-standard definitions for managing transmission media are defined, the transmission group is used to provide a prefix for the names of those objects. Typically, such definitions reside in the experimental portion of the MIB until they are "proven", then as a part of the Internet standardization process, the definitions are accordingly elevated and a new object identifier, under the transmission group is defined. By convention, the name assigned is: type OBJECT IDENTIFIER ::= { transmission number } where "type" is the symbolic value used for the media in the ifType column of the ifTable object, and "number" is the actual integer value corresponding to the symbol. 3.13. The SNMP Group The application-oriented working groups of the IETF have been tasked to be receptive towards defining MIB variables specific to their respective applications. For the SNMP, it is useful to have statistical information. A new group, the SNMP group, is allocated for this purpose: snmp OBJECT IDENTIFIER ::= { mib-2 11 } SNMP Working Group [Page 8] RFC 1213 MIB-II March 1991 3.14. Changes from RFC 1158 Features of this MIB include: (1) The managed objects in this document have been defined using the conventions defined in the Internet-standard SMI, as amended by the extensions specified in [14]. It must be emphasized that definitions made using these extensions are semantically identically to those in RFC 1158. (2) The PhysAddress textual convention has been introduced to represent media addresses. (3) The ACCESS clause of sysLocation is now read-write. (4) The definition of sysServices has been clarified. (5) New ifType values (29-32) have been defined. In addition, the textual-descriptor for the DS1 and E1 interface types has been corrected. (6) The definition of ipForwarding has been clarified. (7) The definition of ipRouteType has been clarified. (8) The ipRouteMetric5 and ipRouteInfo objects have been defined. (9) The ACCESS clause of tcpConnState is now read-write, to support deletion of the TCB associated with a TCP connection. The definition of this object has been clarified to explain this usage. (10) The definition of egpNeighEventTrigger has been clarified. (11) The definition of several of the variables in the new snmp group have been clarified. In addition, the snmpInBadTypes and snmpOutReadOnlys objects are no longer present. (However, the object identifiers associated with those objects are reserved to prevent future use.) (12) The definition of snmpInReadOnlys has been clarified. (13) The textual descriptor of the snmpEnableAuthTraps has been changed to snmpEnableAuthenTraps, and the definition has been clarified. SNMP Working Group [Page 9] RFC 1213 MIB-II March 1991 (14) The ipRoutingDiscards object was added. (15) The optional use of an implementation-dependent, small positive integer was disallowed when identifying instances of the IP address and routing tables. 4. Objects Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the subset of Abstract Syntax Notation One (ASN.1) [8] defined in the SMI. In particular, each object has a name, a syntax, and an encoding. The name is an object identifier, an administratively assigned name, which specifies an object type. The object type together with an object instance serves to uniquely identify a specific instantiation of the object. For human convenience, we often use a textual string, termed the OBJECT DESCRIPTOR, to also refer to the object type. The syntax of an object type defines the abstract data structure corresponding to that object type. The ASN.1 language is used for this purpose. However, the SMI [12] purposely restricts the ASN.1 constructs which may be used. These restrictions are explicitly made for simplicity. The encoding of an object type is simply how that object type is represented using the object type's syntax. Implicitly tied to the notion of an object type's syntax and encoding is how the object type is represented when being transmitted on the network. The SMI specifies the use of the basic encoding rules of ASN.1 [9], subject to the additional requirements imposed by the SNMP. 4.1. Format of Definitions Section 6 contains contains the specification of all object types contained in this MIB module. The object types are defined using the conventions defined in the SMI, as amended by the extensions specified in [14]. 5. Overview Consistent with the IAB directive to produce simple, workable systems in the short-term, the list of managed objects defined here, has been derived by taking only those elements which are considered essential. This approach of taking only the essential objects is NOT restrictive, since the SMI defined in the companion memo provides SNMP Working Group [Page 10] RFC 1213 MIB-II March 1991 three extensibility mechanisms: one, the addition of new standard objects through the definitions of new versions of the MIB; two, the addition of widely-available but non-standard objects through the experimental subtree; and three, the addition of private objects through the enterprises subtree. Such additional objects can not only be used for vendor-specific elements, but also for experimentation as required to further the knowledge of which other objects are essential. The design of MIB-II is heavily influenced by the first extensibility mechanism. Several new variables have been added based on operational experience and need. Based on this, the criteria for including an object in MIB-II are remarkably similar to the MIB-I criteria: (1) An object needed to be essential for either fault or configuration management. (2) Only weak control objects were permitted (by weak, it is meant that tampering with them can do only limited damage). This criterion reflects the fact that the current management protocols are not sufficiently secure to do more powerful control operations. (3) Evidence of current use and utility was required. (4) In MIB-I, an attempt was made to limit the number of objects to about 100 to make it easier for vendors to fully instrument their software. In MIB-II, this limit was raised given the wide technological base now implementing MIB-I. (5) To avoid redundant variables, it was required that no object be included that can be derived from others in the MIB. (6) Implementation specific objects (e.g., for BSD UNIX) were excluded. (7) It was agreed to avoid heavily instrumenting critical sections of code. The general guideline was one counter per critical section per layer. MIB-II, like its predecessor, the Internet-standard MIB, contains only essential elements. There is no need to allow individual objects to be optional. Rather, the objects are arranged into the following groups: SNMP Working Group [Page 11] RFC 1213 MIB-II March 1991 - System - Interfaces - Address Translation (deprecated) - IP - ICMP - TCP - UDP - EGP - Transmission - SNMP These groups are the basic unit of conformance: This method is as follows: if the semantics of a group is applicable to an implementation, then it must implement all objects in that group. For example, an implementation must implement the EGP group if and only if it implements the EGP. There are two reasons for defining these groups: to provide a means of assigning object identifiers; and, to provide a method for implementations of managed agents to know which objects they must implement. 6. Definitions RFC1213-MIB DEFINITIONS ::= BEGIN IMPORTS mgmt, NetworkAddress, IpAddress, Counter, Gauge, TimeTicks FROM RFC1155-SMI OBJECT-TYPE FROM RFC-1212; -- This MIB module uses the extended OBJECT-TYPE macro as -- defined in [14]; -- MIB-II (same prefix as MIB-I) mib-2 OBJECT IDENTIFIER ::= { mgmt 1 } -- textual conventions DisplayString ::= OCTET STRING -- This data type is used to model textual information taken -- from the NVT ASCII character set. By convention, objects -- with this syntax are declared as having SNMP Working Group [Page 12] RFC 1213 MIB-II March 1991 -- -- SIZE (0..255) PhysAddress ::= OCTET STRING -- This data type is used to model media addresses. For many -- types of media, this will be in a binary representation. -- For example, an ethernet address would be represented as -- a string of 6 octets. -- groups in MIB-II system OBJECT IDENTIFIER ::= { mib-2 1 } interfaces OBJECT IDENTIFIER ::= { mib-2 2 } at OBJECT IDENTIFIER ::= { mib-2 3 } ip OBJECT IDENTIFIER ::= { mib-2 4 } icmp OBJECT IDENTIFIER ::= { mib-2 5 } tcp OBJECT IDENTIFIER ::= { mib-2 6 } udp OBJECT IDENTIFIER ::= { mib-2 7 } egp OBJECT IDENTIFIER ::= { mib-2 8 } -- historical (some say hysterical) -- cmot OBJECT IDENTIFIER ::= { mib-2 9 } transmission OBJECT IDENTIFIER ::= { mib-2 10 } snmp OBJECT IDENTIFIER ::= { mib-2 11 } -- the System group -- Implementation of the System group is mandatory for all -- systems. If an agent is not configured to have a value -- for any of these variables, a string of length 0 is -- returned. sysDescr OBJECT-TYPE SYNTAX DisplayString (SIZE (0..255)) ACCESS read-only STATUS mandatory SNMP Working Group [Page 13] RFC 1213 MIB-II March 1991 DESCRIPTION "A textual description of the entity. This value should include the full name and version identification of the system's hardware type, software operating-system, and networking software. It is mandatory that this only contain printable ASCII characters." ::= { system 1 } sysObjectID OBJECT-TYPE SYNTAX OBJECT IDENTIFIER ACCESS read-only STATUS mandatory DESCRIPTION "The vendor's authoritative identification of the network management subsystem contained in the entity. This value is allocated within the SMI enterprises subtree (1.3.6.1.4.1) and provides an easy and unambiguous means for determining `what kind of box' is being managed. For example, if vendor `Flintstones, Inc.' was assigned the subtree 1.3.6.1.4.1.4242, it could assign the identifier 1.3.6.1.4.1.4242.1.1 to its `Fred Router'." ::= { system 2 } sysUpTime OBJECT-TYPE SYNTAX TimeTicks ACCESS read-only STATUS mandatory DESCRIPTION "The time (in hundredths of a second) since the network management portion of the system was last re-initialized." ::= { system 3 } sysContact OBJECT-TYPE SYNTAX DisplayString (SIZE (0..255)) ACCESS read-write STATUS mandatory DESCRIPTION "The textual identification of the contact person for this managed node, together with information on how to contact this person." ::= { system 4 } sysName OBJECT-TYPE SYNTAX DisplayString (SIZE (0..255)) SNMP Working Group [Page 14] RFC 1213 MIB-II March 1991 ACCESS read-write STATUS mandatory DESCRIPTION "An administratively-assigned name for this managed node. By convention, this is the node's fully-qualified domain name." ::= { system 5 } sysLocation OBJECT-TYPE SYNTAX DisplayString (SIZE (0..255)) ACCESS read-write STATUS mandatory DESCRIPTION "The physical location of this node (e.g., `telephone closet, 3rd floor')." ::= { system 6 } sysServices OBJECT-TYPE SYNTAX INTEGER (0..127) ACCESS read-only STATUS mandatory DESCRIPTION "A value which indicates the set of services that this entity primarily offers. The value is a sum. This sum initially takes the value zero, Then, for each layer, L, in the range 1 through 7, that this node performs transactions for, 2 raised to (L - 1) is added to the sum. For example, a node which performs primarily routing functions would have a value of 4 (2^(3-1)). In contrast, a node which is a host offering application services would have a value of 72 (2^(4-1) + 2^(7-1)). Note that in the context of the Internet suite of protocols, values should be calculated accordingly: layer functionality 1 physical (e.g., repeaters) 2 datalink/subnetwork (e.g., bridges) 3 internet (e.g., IP gateways) 4 end-to-end (e.g., IP hosts) 7 applications (e.g., mail relays) For systems including OSI protocols, layers 5 and 6 may also be counted." ::= { system 7 } SNMP Working Group [Page 15] RFC 1213 MIB-II March 1991 -- the Interfaces group -- Implementation of the Interfaces group is mandatory for -- all systems. ifNumber OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The number of network interfaces (regardless of their current state) present on this system." ::= { interfaces 1 } -- the Interfaces table -- The Interfaces table contains information on the entity's -- interfaces. Each interface is thought of as being -- attached to a `subnetwork'. Note that this term should -- not be confused with `subnet' which refers to an -- addressing partitioning scheme used in the Internet suite -- of protocols. ifTable OBJECT-TYPE SYNTAX SEQUENCE OF IfEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "A list of interface entries. The number of entries is given by the value of ifNumber." ::= { interfaces 2 } ifEntry OBJECT-TYPE SYNTAX IfEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "An interface entry containing objects at the subnetwork layer and below for a particular interface." INDEX { ifIndex } ::= { ifTable 1 } IfEntry ::= SEQUENCE { ifIndex INTEGER, SNMP Working Group [Page 16] RFC 1213 MIB-II March 1991 ifDescr DisplayString, ifType INTEGER, ifMtu INTEGER, ifSpeed Gauge, ifPhysAddress PhysAddress, ifAdminStatus INTEGER, ifOperStatus INTEGER, ifLastChange TimeTicks, ifInOctets Counter, ifInUcastPkts Counter, ifInNUcastPkts Counter, ifInDiscards Counter, ifInErrors Counter, ifInUnknownProtos Counter, ifOutOctets Counter, ifOutUcastPkts Counter, ifOutNUcastPkts Counter, ifOutDiscards Counter, ifOutErrors Counter, ifOutQLen Gauge, ifSpecific OBJECT IDENTIFIER } ifIndex OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory SNMP Working Group [Page 17] RFC 1213 MIB-II March 1991 DESCRIPTION "A unique value for each interface. Its value ranges between 1 and the value of ifNumber. The value for each interface must remain constant at least from one re-initialization of the entity's network management system to the next re- initialization." ::= { ifEntry 1 } ifDescr OBJECT-TYPE SYNTAX DisplayString (SIZE (0..255)) ACCESS read-only STATUS mandatory DESCRIPTION "A textual string containing information about the interface. This string should include the name of the manufacturer, the product name and the version of the hardware interface." ::= { ifEntry 2 } ifType OBJECT-TYPE SYNTAX INTEGER { other(1), -- none of the following regular1822(2), hdh1822(3), ddn-x25(4), rfc877-x25(5), ethernet-csmacd(6), iso88023-csmacd(7), iso88024-tokenBus(8), iso88025-tokenRing(9), iso88026-man(10), starLan(11), proteon-10Mbit(12), proteon-80Mbit(13), hyperchannel(14), fddi(15), lapb(16), sdlc(17), ds1(18), -- T-1 e1(19), -- european equiv. of T-1 basicISDN(20), primaryISDN(21), -- proprietary serial propPointToPointSerial(22), ppp(23), softwareLoopback(24), eon(25), -- CLNP over IP [11] ethernet-3Mbit(26), SNMP Working Group [Page 18] RFC 1213 MIB-II March 1991 nsip(27), -- XNS over IP slip(28), -- generic SLIP ultra(29), -- ULTRA technologies ds3(30), -- T-3 sip(31), -- SMDS frame-relay(32) } ACCESS read-only STATUS mandatory DESCRIPTION "The type of interface, distinguished according to the physical/link protocol(s) immediately `below' the network layer in the protocol stack." ::= { ifEntry 3 } ifMtu OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The size of the largest datagram which can be sent/received on the interface, specified in octets. For interfaces that are used for transmitting network datagrams, this is the size of the largest network datagram that can be sent on the interface." ::= { ifEntry 4 } ifSpeed OBJECT-TYPE SYNTAX Gauge ACCESS read-only STATUS mandatory DESCRIPTION "An estimate of the interface's current bandwidth in bits per second. For interfaces which do not vary in bandwidth or for those where no accurate estimation can be made, this object should contain the nominal bandwidth." ::= { ifEntry 5 } ifPhysAddress OBJECT-TYPE SYNTAX PhysAddress ACCESS read-only STATUS mandatory DESCRIPTION "The interface's address at the protocol layer immediately `below' the network layer in the protocol stack. For interfaces which do not have SNMP Working Group [Page 19] RFC 1213 MIB-II March 1991 such an address (e.g., a serial line), this object should contain an octet string of zero length." ::= { ifEntry 6 } ifAdminStatus OBJECT-TYPE SYNTAX INTEGER { up(1), -- ready to pass packets down(2), testing(3) -- in some test mode } ACCESS read-write STATUS mandatory DESCRIPTION "The desired state of the interface. The testing(3) state indicates that no operational packets can be passed." ::= { ifEntry 7 } ifOperStatus OBJECT-TYPE SYNTAX INTEGER { up(1), -- ready to pass packets down(2), testing(3) -- in some test mode } ACCESS read-only STATUS mandatory DESCRIPTION "The current operational state of the interface. The testing(3) state indicates that no operational packets can be passed." ::= { ifEntry 8 } ifLastChange OBJECT-TYPE SYNTAX TimeTicks ACCESS read-only STATUS mandatory DESCRIPTION "The value of sysUpTime at the time the interface entered its current operational state. If the current state was entered prior to the last re- initialization of the local network management subsystem, then this object contains a zero value." ::= { ifEntry 9 } ifInOctets OBJECT-TYPE SYNTAX Counter ACCESS read-only SNMP Working Group [Page 20] RFC 1213 MIB-II March 1991 STATUS mandatory DESCRIPTION "The total number of octets received on the interface, including framing characters." ::= { ifEntry 10 } ifInUcastPkts OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of subnetwork-unicast packets delivered to a higher-layer protocol." ::= { ifEntry 11 } ifInNUcastPkts OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of non-unicast (i.e., subnetwork- broadcast or subnetwork-multicast) packets delivered to a higher-layer protocol." ::= { ifEntry 12 } ifInDiscards OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of inbound packets which were chosen to be discarded even though no errors had been detected to prevent their being deliverable to a higher-layer protocol. One possible reason for discarding such a packet could be to free up buffer space." ::= { ifEntry 13 } ifInErrors OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of inbound packets that contained errors preventing them from being deliverable to a higher-layer protocol." ::= { ifEntry 14 } SNMP Working Group [Page 21] RFC 1213 MIB-II March 1991 ifInUnknownProtos OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of packets received via the interface which were discarded because of an unknown or unsupported protocol." ::= { ifEntry 15 } ifOutOctets OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of octets transmitted out of the interface, including framing characters." ::= { ifEntry 16 } ifOutUcastPkts OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of packets that higher-level protocols requested be transmitted to a subnetwork-unicast address, including those that were discarded or not sent." ::= { ifEntry 17 } ifOutNUcastPkts OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of packets that higher-level protocols requested be transmitted to a non- unicast (i.e., a subnetwork-broadcast or subnetwork-multicast) address, including those that were discarded or not sent." ::= { ifEntry 18 } ifOutDiscards OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of outbound packets which were chosen SNMP Working Group [Page 22] RFC 1213 MIB-II March 1991 to be discarded even though no errors had been detected to prevent their being transmitted. One possible reason for discarding such a packet could be to free up buffer space." ::= { ifEntry 19 } ifOutErrors OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of outbound packets that could not be transmitted because of errors." ::= { ifEntry 20 } ifOutQLen OBJECT-TYPE SYNTAX Gauge ACCESS read-only STATUS mandatory DESCRIPTION "The length of the output packet queue (in packets)." ::= { ifEntry 21 } ifSpecific OBJECT-TYPE SYNTAX OBJECT IDENTIFIER ACCESS read-only STATUS mandatory DESCRIPTION "A reference to MIB definitions specific to the particular media being used to realize the interface. For example, if the interface is realized by an ethernet, then the value of this object refers to a document defining objects specific to ethernet. If this information is not present, its value should be set to the OBJECT IDENTIFIER { 0 0 }, which is a syntatically valid object identifier, and any conformant implementation of ASN.1 and BER must be able to generate and recognize this value." ::= { ifEntry 22 } -- the Address Translation group -- Implementation of the Address Translation group is -- mandatory for all systems. Note however that this group -- is deprecated by MIB-II. That is, it is being included SNMP Working Group [Page 23] RFC 1213 MIB-II March 1991 -- solely for compatibility with MIB-I nodes, and will most -- likely be excluded from MIB-III nodes. From MIB-II and -- onwards, each network protocol group contains its own -- address translation tables. -- The Address Translation group contains one table which is -- the union across all interfaces of the translation tables -- for converting a NetworkAddress (e.g., an IP address) into -- a subnetwork-specific address. For lack of a better term, -- this document refers to such a subnetwork-specific address -- as a `physical' address. -- Examples of such translation tables are: for broadcast -- media where ARP is in use, the translation table is -- equivalent to the ARP cache; or, on an X.25 network where -- non-algorithmic translation to X.121 addresses is -- required, the translation table contains the -- NetworkAddress to X.121 address equivalences. atTable OBJECT-TYPE SYNTAX SEQUENCE OF AtEntry ACCESS not-accessible STATUS deprecated DESCRIPTION "The Address Translation tables contain the NetworkAddress to `physical' address equivalences. Some interfaces do not use translation tables for determining address equivalences (e.g., DDN-X.25 has an algorithmic method); if all interfaces are of this type, then the Address Translation table is empty, i.e., has zero entries." ::= { at 1 } atEntry OBJECT-TYPE SYNTAX AtEntry ACCESS not-accessible STATUS deprecated DESCRIPTION "Each entry contains one NetworkAddress to `physical' address equivalence." INDEX { atIfIndex, atNetAddress } ::= { atTable 1 } AtEntry ::= SEQUENCE { atIfIndex INTEGER, SNMP Working Group [Page 24] RFC 1213 MIB-II March 1991 atPhysAddress PhysAddress, atNetAddress NetworkAddress } atIfIndex OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS deprecated DESCRIPTION "The interface on which this entry's equivalence is effective. The interface identified by a particular value of this index is the same interface as identified by the same value of ifIndex." ::= { atEntry 1 } atPhysAddress OBJECT-TYPE SYNTAX PhysAddress ACCESS read-write STATUS deprecated DESCRIPTION "The media-dependent `physical' address. Setting this object to a null string (one of zero length) has the effect of invaliding the corresponding entry in the atTable object. That is, it effectively dissasociates the interface identified with said entry from the mapping identified with said entry. It is an implementation-specific matter as to whether the agent removes an invalidated entry from the table. Accordingly, management stations must be prepared to receive tabular information from agents that corresponds to entries not currently in use. Proper interpretation of such entries requires examination of the relevant atPhysAddress object." ::= { atEntry 2 } atNetAddress OBJECT-TYPE SYNTAX NetworkAddress ACCESS read-write STATUS deprecated DESCRIPTION "The NetworkAddress (e.g., the IP address) corresponding to the media-dependent `physical' address." SNMP Working Group [Page 25] RFC 1213 MIB-II March 1991 ::= { atEntry 3 } -- the IP group -- Implementation of the IP group is mandatory for all -- systems. ipForwarding OBJECT-TYPE SYNTAX INTEGER { forwarding(1), -- acting as a gateway not-forwarding(2) -- NOT acting as a gateway } ACCESS read-write STATUS mandatory DESCRIPTION "The indication of whether this entity is acting as an IP gateway in respect to the forwarding of datagrams received by, but not addressed to, this entity. IP gateways forward datagrams. IP hosts do not (except those source-routed via the host). Note that for some managed nodes, this object may take on only a subset of the values possible. Accordingly, it is appropriate for an agent to return a `badValue' response if a management station attempts to change this object to an inappropriate value." ::= { ip 1 } ipDefaultTTL OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "The default value inserted into the Time-To-Live field of the IP header of datagrams originated at this entity, whenever a TTL value is not supplied by the transport layer protocol." ::= { ip 2 } ipInReceives OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of input datagrams received from interfaces, including those received in error." SNMP Working Group [Page 26] RFC 1213 MIB-II March 1991 ::= { ip 3 } ipInHdrErrors OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of input datagrams discarded due to errors in their IP headers, including bad checksums, version number mismatch, other format errors, time-to-live exceeded, errors discovered in processing their IP options, etc." ::= { ip 4 } ipInAddrErrors OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of input datagrams discarded because the IP address in their IP header's destination field was not a valid address to be received at this entity. This count includes invalid addresses (e.g., 0.0.0.0) and addresses of unsupported Classes (e.g., Class E). For entities which are not IP Gateways and therefore do not forward datagrams, this counter includes datagrams discarded because the destination address was not a local address." ::= { ip 5 } ipForwDatagrams OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of input datagrams for which this entity was not their final IP destination, as a result of which an attempt was made to find a route to forward them to that final destination. In entities which do not act as IP Gateways, this counter will include only those packets which were Source-Routed via this entity, and the Source- Route option processing was successful." ::= { ip 6 } ipInUnknownProtos OBJECT-TYPE SYNTAX Counter SNMP Working Group [Page 27] RFC 1213 MIB-II March 1991 ACCESS read-only STATUS mandatory DESCRIPTION "The number of locally-addressed datagrams received successfully but discarded because of an unknown or unsupported protocol." ::= { ip 7 } ipInDiscards OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of input IP datagrams for which no problems were encountered to prevent their continued processing, but which were discarded (e.g., for lack of buffer space). Note that this counter does not include any datagrams discarded while awaiting re-assembly." ::= { ip 8 } ipInDelivers OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of input datagrams successfully delivered to IP user-protocols (including ICMP)." ::= { ip 9 } ipOutRequests OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of IP datagrams which local IP user-protocols (including ICMP) supplied to IP in requests for transmission. Note that this counter does not include any datagrams counted in ipForwDatagrams." ::= { ip 10 } ipOutDiscards OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of output IP datagrams for which no SNMP Working Group [Page 28] RFC 1213 MIB-II March 1991 problem was encountered to prevent their transmission to their destination, but which were discarded (e.g., for lack of buffer space). Note that this counter would include datagrams counted in ipForwDatagrams if any such packets met this (discretionary) discard criterion." ::= { ip 11 } ipOutNoRoutes OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of IP datagrams discarded because no route could be found to transmit them to their destination. Note that this counter includes any packets counted in ipForwDatagrams which meet this `no-route' criterion. Note that this includes any datagarms which a host cannot route because all of its default gateways are down." ::= { ip 12 } ipReasmTimeout OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The maximum number of seconds which received fragments are held while they are awaiting reassembly at this entity." ::= { ip 13 } ipReasmReqds OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of IP fragments received which needed to be reassembled at this entity." ::= { ip 14 } ipReasmOKs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of IP datagrams successfully re- assembled." SNMP Working Group [Page 29] RFC 1213 MIB-II March 1991 ::= { ip 15 } ipReasmFails OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of failures detected by the IP re- assembly algorithm (for whatever reason: timed out, errors, etc). Note that this is not necessarily a count of discarded IP fragments since some algorithms (notably the algorithm in RFC 815) can lose track of the number of fragments by combining them as they are received." ::= { ip 16 } ipFragOKs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of IP datagrams that have been successfully fragmented at this entity." ::= { ip 17 } ipFragFails OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of IP datagrams that have been discarded because they needed to be fragmented at this entity but could not be, e.g., because their Don't Fragment flag was set." ::= { ip 18 } ipFragCreates OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of IP datagram fragments that have been generated as a result of fragmentation at this entity." ::= { ip 19 } SNMP Working Group [Page 30] RFC 1213 MIB-II March 1991 -- the IP address table -- The IP address table contains this entity's IP addressing -- information. ipAddrTable OBJECT-TYPE SYNTAX SEQUENCE OF IpAddrEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "The table of addressing information relevant to this entity's IP addresses." ::= { ip 20 } ipAddrEntry OBJECT-TYPE SYNTAX IpAddrEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "The addressing information for one of this entity's IP addresses." INDEX { ipAdEntAddr } ::= { ipAddrTable 1 } IpAddrEntry ::= SEQUENCE { ipAdEntAddr IpAddress, ipAdEntIfIndex INTEGER, ipAdEntNetMask IpAddress, ipAdEntBcastAddr INTEGER, ipAdEntReasmMaxSize INTEGER (0..65535) } ipAdEntAddr OBJECT-TYPE SYNTAX IpAddress ACCESS read-only STATUS mandatory DESCRIPTION "The IP address to which this entry's addressing information pertains." ::= { ipAddrEntry 1 } SNMP Working Group [Page 31] RFC 1213 MIB-II March 1991 ipAdEntIfIndex OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The index value which uniquely identifies the interface to which this entry is applicable. The interface identified by a particular value of this index is the same interface as identified by the same value of ifIndex." ::= { ipAddrEntry 2 } ipAdEntNetMask OBJECT-TYPE SYNTAX IpAddress ACCESS read-only STATUS mandatory DESCRIPTION "The subnet mask associated with the IP address of this entry. The value of the mask is an IP address with all the network bits set to 1 and all the hosts bits set to 0." ::= { ipAddrEntry 3 } ipAdEntBcastAddr OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The value of the least-significant bit in the IP broadcast address used for sending datagrams on the (logical) interface associated with the IP address of this entry. For example, when the Internet standard all-ones broadcast address is used, the value will be 1. This value applies to both the subnet and network broadcasts addresses used by the entity on this (logical) interface." ::= { ipAddrEntry 4 } ipAdEntReasmMaxSize OBJECT-TYPE SYNTAX INTEGER (0..65535) ACCESS read-only STATUS mandatory DESCRIPTION "The size of the largest IP datagram which this entity can re-assemble from incoming IP fragmented datagrams received on this interface." ::= { ipAddrEntry 5 } SNMP Working Group [Page 32] RFC 1213 MIB-II March 1991 -- the IP routing table -- The IP routing table contains an entry for each route -- presently known to this entity. ipRouteTable OBJECT-TYPE SYNTAX SEQUENCE OF IpRouteEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "This entity's IP Routing table." ::= { ip 21 } ipRouteEntry OBJECT-TYPE SYNTAX IpRouteEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "A route to a particular destination." INDEX { ipRouteDest } ::= { ipRouteTable 1 } IpRouteEntry ::= SEQUENCE { ipRouteDest IpAddress, ipRouteIfIndex INTEGER, ipRouteMetric1 INTEGER, ipRouteMetric2 INTEGER, ipRouteMetric3 INTEGER, ipRouteMetric4 INTEGER, ipRouteNextHop IpAddress, ipRouteType INTEGER, ipRouteProto INTEGER, ipRouteAge INTEGER, ipRouteMask IpAddress, ipRouteMetric5 INTEGER, SNMP Working Group [Page 33] RFC 1213 MIB-II March 1991 ipRouteInfo OBJECT IDENTIFIER } ipRouteDest OBJECT-TYPE SYNTAX IpAddress ACCESS read-write STATUS mandatory DESCRIPTION "The destination IP address of this route. An entry with a value of 0.0.0.0 is considered a default route. Multiple routes to a single destination can appear in the table, but access to such multiple entries is dependent on the table- access mechanisms defined by the network management protocol in use." ::= { ipRouteEntry 1 } ipRouteIfIndex OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "The index value which uniquely identifies the local interface through which the next hop of this route should be reached. The interface identified by a particular value of this index is the same interface as identified by the same value of ifIndex." ::= { ipRouteEntry 2 } ipRouteMetric1 OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "The primary routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1." ::= { ipRouteEntry 3 } ipRouteMetric2 OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION SNMP Working Group [Page 34] RFC 1213 MIB-II March 1991 "An alternate routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1." ::= { ipRouteEntry 4 } ipRouteMetric3 OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "An alternate routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1." ::= { ipRouteEntry 5 } ipRouteMetric4 OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "An alternate routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1." ::= { ipRouteEntry 6 } ipRouteNextHop OBJECT-TYPE SYNTAX IpAddress ACCESS read-write STATUS mandatory DESCRIPTION "The IP address of the next hop of this route. (In the case of a route bound to an interface which is realized via a broadcast media, the value of this field is the agent's IP address on that interface.)" ::= { ipRouteEntry 7 } ipRouteType OBJECT-TYPE SYNTAX INTEGER { other(1), -- none of the following invalid(2), -- an invalidated route SNMP Working Group [Page 35] RFC 1213 MIB-II March 1991 -- route to directly direct(3), -- connected (sub-)network -- route to a non-local indirect(4) -- host/network/sub-network } ACCESS read-write STATUS mandatory DESCRIPTION "The type of route. Note that the values direct(3) and indirect(4) refer to the notion of direct and indirect routing in the IP architecture. Setting this object to the value invalid(2) has the effect of invalidating the corresponding entry in the ipRouteTable object. That is, it effectively dissasociates the destination identified with said entry from the route identified with said entry. It is an implementation-specific matter as to whether the agent removes an invalidated entry from the table. Accordingly, management stations must be prepared to receive tabular information from agents that corresponds to entries not currently in use. Proper interpretation of such entries requires examination of the relevant ipRouteType object." ::= { ipRouteEntry 8 } ipRouteProto OBJECT-TYPE SYNTAX INTEGER { other(1), -- none of the following -- non-protocol information, -- e.g., manually configured local(2), -- entries -- set via a network netmgmt(3), -- management protocol -- obtained via ICMP, icmp(4), -- e.g., Redirect -- the remaining values are -- all gateway routing -- protocols egp(5), ggp(6), SNMP Working Group [Page 36] RFC 1213 MIB-II March 1991 hello(7), rip(8), is-is(9), es-is(10), ciscoIgrp(11), bbnSpfIgp(12), ospf(13), bgp(14) } ACCESS read-only STATUS mandatory DESCRIPTION "The routing mechanism via which this route was learned. Inclusion of values for gateway routing protocols is not intended to imply that hosts should support those protocols." ::= { ipRouteEntry 9 } ipRouteAge OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "The number of seconds since this route was last updated or otherwise determined to be correct. Note that no semantics of `too old' can be implied except through knowledge of the routing protocol by which the route was learned." ::= { ipRouteEntry 10 } ipRouteMask OBJECT-TYPE SYNTAX IpAddress ACCESS read-write STATUS mandatory DESCRIPTION "Indicate the mask to be logical-ANDed with the destination address before being compared to the value in the ipRouteDest field. For those systems that do not support arbitrary subnet masks, an agent constructs the value of the ipRouteMask by determining whether the value of the correspondent ipRouteDest field belong to a class-A, B, or C network, and then using one of: mask network 255.0.0.0 class-A 255.255.0.0 class-B 255.255.255.0 class-C SNMP Working Group [Page 37] RFC 1213 MIB-II March 1991 If the value of the ipRouteDest is 0.0.0.0 (a default route), then the mask value is also 0.0.0.0. It should be noted that all IP routing subsystems implicitly use this mechanism." ::= { ipRouteEntry 11 } ipRouteMetric5 OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "An alternate routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1." ::= { ipRouteEntry 12 } ipRouteInfo OBJECT-TYPE SYNTAX OBJECT IDENTIFIER ACCESS read-only STATUS mandatory DESCRIPTION "A reference to MIB definitions specific to the particular routing protocol which is responsible for this route, as determined by the value specified in the route's ipRouteProto value. If this information is not present, its value should be set to the OBJECT IDENTIFIER { 0 0 }, which is a syntatically valid object identifier, and any conformant implementation of ASN.1 and BER must be able to generate and recognize this value." ::= { ipRouteEntry 13 } -- the IP Address Translation table -- The IP address translation table contain the IpAddress to -- `physical' address equivalences. Some interfaces do not -- use translation tables for determining address -- equivalences (e.g., DDN-X.25 has an algorithmic method); -- if all interfaces are of this type, then the Address -- Translation table is empty, i.e., has zero entries. ipNetToMediaTable OBJECT-TYPE SYNTAX SEQUENCE OF IpNetToMediaEntry ACCESS not-accessible STATUS mandatory SNMP Working Group [Page 38] RFC 1213 MIB-II March 1991 DESCRIPTION "The IP Address Translation table used for mapping from IP addresses to physical addresses." ::= { ip 22 } ipNetToMediaEntry OBJECT-TYPE SYNTAX IpNetToMediaEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "Each entry contains one IpAddress to `physical' address equivalence." INDEX { ipNetToMediaIfIndex, ipNetToMediaNetAddress } ::= { ipNetToMediaTable 1 } IpNetToMediaEntry ::= SEQUENCE { ipNetToMediaIfIndex INTEGER, ipNetToMediaPhysAddress PhysAddress, ipNetToMediaNetAddress IpAddress, ipNetToMediaType INTEGER } ipNetToMediaIfIndex OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "The interface on which this entry's equivalence is effective. The interface identified by a particular value of this index is the same interface as identified by the same value of ifIndex." ::= { ipNetToMediaEntry 1 } ipNetToMediaPhysAddress OBJECT-TYPE SYNTAX PhysAddress ACCESS read-write STATUS mandatory DESCRIPTION "The media-dependent `physical' address." ::= { ipNetToMediaEntry 2 } SNMP Working Group [Page 39] RFC 1213 MIB-II March 1991 ipNetToMediaNetAddress OBJECT-TYPE SYNTAX IpAddress ACCESS read-write STATUS mandatory DESCRIPTION "The IpAddress corresponding to the media- dependent `physical' address." ::= { ipNetToMediaEntry 3 } ipNetToMediaType OBJECT-TYPE SYNTAX INTEGER { other(1), -- none of the following invalid(2), -- an invalidated mapping dynamic(3), static(4) } ACCESS read-write STATUS mandatory DESCRIPTION "The type of mapping. Setting this object to the value invalid(2) has the effect of invalidating the corresponding entry in the ipNetToMediaTable. That is, it effectively dissasociates the interface identified with said entry from the mapping identified with said entry. It is an implementation-specific matter as to whether the agent removes an invalidated entry from the table. Accordingly, management stations must be prepared to receive tabular information from agents that corresponds to entries not currently in use. Proper interpretation of such entries requires examination of the relevant ipNetToMediaType object." ::= { ipNetToMediaEntry 4 } -- additional IP objects ipRoutingDiscards OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of routing entries which were chosen to be discarded even though they are valid. One possible reason for discarding such an entry could be to free-up buffer space for other routing SNMP Working Group [Page 40] RFC 1213 MIB-II March 1991 entries." ::= { ip 23 } -- the ICMP group -- Implementation of the ICMP group is mandatory for all -- systems. icmpInMsgs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of ICMP messages which the entity received. Note that this counter includes all those counted by icmpInErrors." ::= { icmp 1 } icmpInErrors OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP messages which the entity received but determined as having ICMP-specific errors (bad ICMP checksums, bad length, etc.)." ::= { icmp 2 } icmpInDestUnreachs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Destination Unreachable messages received." ::= { icmp 3 } icmpInTimeExcds OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Time Exceeded messages received." ::= { icmp 4 } SNMP Working Group [Page 41] RFC 1213 MIB-II March 1991 icmpInParmProbs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Parameter Problem messages received." ::= { icmp 5 } icmpInSrcQuenchs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Source Quench messages received." ::= { icmp 6 } icmpInRedirects OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Redirect messages received." ::= { icmp 7 } icmpInEchos OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Echo (request) messages received." ::= { icmp 8 } icmpInEchoReps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Echo Reply messages received." ::= { icmp 9 } icmpInTimestamps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION SNMP Working Group [Page 42] RFC 1213 MIB-II March 1991 "The number of ICMP Timestamp (request) messages received." ::= { icmp 10 } icmpInTimestampReps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Timestamp Reply messages received." ::= { icmp 11 } icmpInAddrMasks OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Address Mask Request messages received." ::= { icmp 12 } icmpInAddrMaskReps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Address Mask Reply messages received." ::= { icmp 13 } icmpOutMsgs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of ICMP messages which this entity attempted to send. Note that this counter includes all those counted by icmpOutErrors." ::= { icmp 14 } icmpOutErrors OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP messages which this entity did not send due to problems discovered within ICMP SNMP Working Group [Page 43] RFC 1213 MIB-II March 1991 such as a lack of buffers. This value should not include errors discovered outside the ICMP layer such as the inability of IP to route the resultant datagram. In some implementations there may be no types of error which contribute to this counter's value." ::= { icmp 15 } icmpOutDestUnreachs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Destination Unreachable messages sent." ::= { icmp 16 } icmpOutTimeExcds OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Time Exceeded messages sent." ::= { icmp 17 } icmpOutParmProbs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Parameter Problem messages sent." ::= { icmp 18 } icmpOutSrcQuenchs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Source Quench messages sent." ::= { icmp 19 } icmpOutRedirects OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Redirect messages sent. For a SNMP Working Group [Page 44] RFC 1213 MIB-II March 1991 host, this object will always be zero, since hosts do not send redirects." ::= { icmp 20 } icmpOutEchos OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Echo (request) messages sent." ::= { icmp 21 } icmpOutEchoReps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Echo Reply messages sent." ::= { icmp 22 } icmpOutTimestamps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Timestamp (request) messages sent." ::= { icmp 23 } icmpOutTimestampReps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Timestamp Reply messages sent." ::= { icmp 24 } icmpOutAddrMasks OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Address Mask Request messages sent." ::= { icmp 25 } SNMP Working Group [Page 45] RFC 1213 MIB-II March 1991 icmpOutAddrMaskReps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of ICMP Address Mask Reply messages sent." ::= { icmp 26 } -- the TCP group -- Implementation of the TCP group is mandatory for all -- systems that implement the TCP. -- Note that instances of object types that represent -- information about a particular TCP connection are -- transient; they persist only as long as the connection -- in question. tcpRtoAlgorithm OBJECT-TYPE SYNTAX INTEGER { other(1), -- none of the following constant(2), -- a constant rto rsre(3), -- MIL-STD-1778, Appendix B vanj(4) -- Van Jacobson's algorithm [10] } ACCESS read-only STATUS mandatory DESCRIPTION "The algorithm used to determine the timeout value used for retransmitting unacknowledged octets." ::= { tcp 1 } tcpRtoMin OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The minimum value permitted by a TCP implementation for the retransmission timeout, measured in milliseconds. More refined semantics for objects of this type depend upon the algorithm used to determine the retransmission timeout. In particular, when the timeout algorithm is rsre(3), an object of this type has the semantics of the LBOUND quantity described in RFC 793." SNMP Working Group [Page 46] RFC 1213 MIB-II March 1991 ::= { tcp 2 } tcpRtoMax OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The maximum value permitted by a TCP implementation for the retransmission timeout, measured in milliseconds. More refined semantics for objects of this type depend upon the algorithm used to determine the retransmission timeout. In particular, when the timeout algorithm is rsre(3), an object of this type has the semantics of the UBOUND quantity described in RFC 793." ::= { tcp 3 } tcpMaxConn OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The limit on the total number of TCP connections the entity can support. In entities where the maximum number of connections is dynamic, this object should contain the value -1." ::= { tcp 4 } tcpActiveOpens OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of times TCP connections have made a direct transition to the SYN-SENT state from the CLOSED state." ::= { tcp 5 } tcpPassiveOpens OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of times TCP connections have made a direct transition to the SYN-RCVD state from the LISTEN state." ::= { tcp 6 } SNMP Working Group [Page 47] RFC 1213 MIB-II March 1991 tcpAttemptFails OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of times TCP connections have made a direct transition to the CLOSED state from either the SYN-SENT state or the SYN-RCVD state, plus the number of times TCP connections have made a direct transition to the LISTEN state from the SYN-RCVD state." ::= { tcp 7 } tcpEstabResets OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of times TCP connections have made a direct transition to the CLOSED state from either the ESTABLISHED state or the CLOSE-WAIT state." ::= { tcp 8 } tcpCurrEstab OBJECT-TYPE SYNTAX Gauge ACCESS read-only STATUS mandatory DESCRIPTION "The number of TCP connections for which the current state is either ESTABLISHED or CLOSE- WAIT." ::= { tcp 9 } tcpInSegs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of segments received, including those received in error. This count includes segments received on currently established connections." ::= { tcp 10 } tcpOutSegs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory SNMP Working Group [Page 48] RFC 1213 MIB-II March 1991 DESCRIPTION "The total number of segments sent, including those on current connections but excluding those containing only retransmitted octets." ::= { tcp 11 } tcpRetransSegs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of segments retransmitted - that is, the number of TCP segments transmitted containing one or more previously transmitted octets." ::= { tcp 12 } -- the TCP Connection table -- The TCP connection table contains information about this -- entity's existing TCP connections. tcpConnTable OBJECT-TYPE SYNTAX SEQUENCE OF TcpConnEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "A table containing TCP connection-specific information." ::= { tcp 13 } tcpConnEntry OBJECT-TYPE SYNTAX TcpConnEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "Information about a particular current TCP connection. An object of this type is transient, in that it ceases to exist when (or soon after) the connection makes the transition to the CLOSED state." INDEX { tcpConnLocalAddress, tcpConnLocalPort, tcpConnRemAddress, tcpConnRemPort } ::= { tcpConnTable 1 } SNMP Working Group [Page 49] RFC 1213 MIB-II March 1991 TcpConnEntry ::= SEQUENCE { tcpConnState INTEGER, tcpConnLocalAddress IpAddress, tcpConnLocalPort INTEGER (0..65535), tcpConnRemAddress IpAddress, tcpConnRemPort INTEGER (0..65535) } tcpConnState OBJECT-TYPE SYNTAX INTEGER { closed(1), listen(2), synSent(3), synReceived(4), established(5), finWait1(6), finWait2(7), closeWait(8), lastAck(9), closing(10), timeWait(11), deleteTCB(12) } ACCESS read-write STATUS mandatory DESCRIPTION "The state of this TCP connection. The only value which may be set by a management station is deleteTCB(12). Accordingly, it is appropriate for an agent to return a `badValue' response if a management station attempts to set this object to any other value. If a management station sets this object to the value deleteTCB(12), then this has the effect of deleting the TCB (as defined in RFC 793) of the corresponding connection on the managed node, resulting in immediate termination of the connection. As an implementation-specific option, a RST SNMP Working Group [Page 50] RFC 1213 MIB-II March 1991 segment may be sent from the managed node to the other TCP endpoint (note however that RST segments are not sent reliably)." ::= { tcpConnEntry 1 } tcpConnLocalAddress OBJECT-TYPE SYNTAX IpAddress ACCESS read-only STATUS mandatory DESCRIPTION "The local IP address for this TCP connection. In the case of a connection in the listen state which is willing to accept connections for any IP interface associated with the node, the value 0.0.0.0 is used." ::= { tcpConnEntry 2 } tcpConnLocalPort OBJECT-TYPE SYNTAX INTEGER (0..65535) ACCESS read-only STATUS mandatory DESCRIPTION "The local port number for this TCP connection." ::= { tcpConnEntry 3 } tcpConnRemAddress OBJECT-TYPE SYNTAX IpAddress ACCESS read-only STATUS mandatory DESCRIPTION "The remote IP address for this TCP connection." ::= { tcpConnEntry 4 } tcpConnRemPort OBJECT-TYPE SYNTAX INTEGER (0..65535) ACCESS read-only STATUS mandatory DESCRIPTION "The remote port number for this TCP connection." ::= { tcpConnEntry 5 } -- additional TCP objects tcpInErrs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory SNMP Working Group [Page 51] RFC 1213 MIB-II March 1991 DESCRIPTION "The total number of segments received in error (e.g., bad TCP checksums)." ::= { tcp 14 } tcpOutRsts OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of TCP segments sent containing the RST flag." ::= { tcp 15 } -- the UDP group -- Implementation of the UDP group is mandatory for all -- systems which implement the UDP. udpInDatagrams OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of UDP datagrams delivered to UDP users." ::= { udp 1 } udpNoPorts OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of received UDP datagrams for which there was no application at the destination port." ::= { udp 2 } udpInErrors OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of received UDP datagrams that could not be delivered for reasons other than the lack of an application at the destination port." ::= { udp 3 } SNMP Working Group [Page 52] RFC 1213 MIB-II March 1991 udpOutDatagrams OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of UDP datagrams sent from this entity." ::= { udp 4 } -- the UDP Listener table -- The UDP listener table contains information about this -- entity's UDP end-points on which a local application is -- currently accepting datagrams. udpTable OBJECT-TYPE SYNTAX SEQUENCE OF UdpEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "A table containing UDP listener information." ::= { udp 5 } udpEntry OBJECT-TYPE SYNTAX UdpEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "Information about a particular current UDP listener." INDEX { udpLocalAddress, udpLocalPort } ::= { udpTable 1 } UdpEntry ::= SEQUENCE { udpLocalAddress IpAddress, udpLocalPort INTEGER (0..65535) } udpLocalAddress OBJECT-TYPE SYNTAX IpAddress ACCESS read-only STATUS mandatory DESCRIPTION "The local IP address for this UDP listener. In SNMP Working Group [Page 53] RFC 1213 MIB-II March 1991 the case of a UDP listener which is willing to accept datagrams for any IP interface associated with the node, the value 0.0.0.0 is used." ::= { udpEntry 1 } udpLocalPort OBJECT-TYPE SYNTAX INTEGER (0..65535) ACCESS read-only STATUS mandatory DESCRIPTION "The local port number for this UDP listener." ::= { udpEntry 2 } -- the EGP group -- Implementation of the EGP group is mandatory for all -- systems which implement the EGP. egpInMsgs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of EGP messages received without error." ::= { egp 1 } egpInErrors OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of EGP messages received that proved to be in error." ::= { egp 2 } egpOutMsgs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of locally generated EGP messages." ::= { egp 3 } egpOutErrors OBJECT-TYPE SYNTAX Counter SNMP Working Group [Page 54] RFC 1213 MIB-II March 1991 ACCESS read-only STATUS mandatory DESCRIPTION "The number of locally generated EGP messages not sent due to resource limitations within an EGP entity." ::= { egp 4 } -- the EGP Neighbor table -- The EGP neighbor table contains information about this -- entity's EGP neighbors. egpNeighTable OBJECT-TYPE SYNTAX SEQUENCE OF EgpNeighEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "The EGP neighbor table." ::= { egp 5 } egpNeighEntry OBJECT-TYPE SYNTAX EgpNeighEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "Information about this entity's relationship with a particular EGP neighbor." INDEX { egpNeighAddr } ::= { egpNeighTable 1 } EgpNeighEntry ::= SEQUENCE { egpNeighState INTEGER, egpNeighAddr IpAddress, egpNeighAs INTEGER, egpNeighInMsgs Counter, egpNeighInErrs Counter, egpNeighOutMsgs Counter, egpNeighOutErrs Counter, SNMP Working Group [Page 55] RFC 1213 MIB-II March 1991 egpNeighInErrMsgs Counter, egpNeighOutErrMsgs Counter, egpNeighStateUps Counter, egpNeighStateDowns Counter, egpNeighIntervalHello INTEGER, egpNeighIntervalPoll INTEGER, egpNeighMode INTEGER, egpNeighEventTrigger INTEGER } egpNeighState OBJECT-TYPE SYNTAX INTEGER { idle(1), acquisition(2), down(3), up(4), cease(5) } ACCESS read-only STATUS mandatory DESCRIPTION "The EGP state of the local system with respect to this entry's EGP neighbor. Each EGP state is represented by a value that is one greater than the numerical value associated with said state in RFC 904." ::= { egpNeighEntry 1 } egpNeighAddr OBJECT-TYPE SYNTAX IpAddress ACCESS read-only STATUS mandatory DESCRIPTION "The IP address of this entry's EGP neighbor." ::= { egpNeighEntry 2 } egpNeighAs OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory SNMP Working Group [Page 56] RFC 1213 MIB-II March 1991 DESCRIPTION "The autonomous system of this EGP peer. Zero should be specified if the autonomous system number of the neighbor is not yet known." ::= { egpNeighEntry 3 } egpNeighInMsgs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of EGP messages received without error from this EGP peer." ::= { egpNeighEntry 4 } egpNeighInErrs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of EGP messages received from this EGP peer that proved to be in error (e.g., bad EGP checksum)." ::= { egpNeighEntry 5 } egpNeighOutMsgs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of locally generated EGP messages to this EGP peer." ::= { egpNeighEntry 6 } egpNeighOutErrs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of locally generated EGP messages not sent to this EGP peer due to resource limitations within an EGP entity." ::= { egpNeighEntry 7 } egpNeighInErrMsgs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory SNMP Working Group [Page 57] RFC 1213 MIB-II March 1991 DESCRIPTION "The number of EGP-defined error messages received from this EGP peer." ::= { egpNeighEntry 8 } egpNeighOutErrMsgs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of EGP-defined error messages sent to this EGP peer." ::= { egpNeighEntry 9 } egpNeighStateUps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of EGP state transitions to the UP state with this EGP peer." ::= { egpNeighEntry 10 } egpNeighStateDowns OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The number of EGP state transitions from the UP state to any other state with this EGP peer." ::= { egpNeighEntry 11 } egpNeighIntervalHello OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The interval between EGP Hello command retransmissions (in hundredths of a second). This represents the t1 timer as defined in RFC 904." ::= { egpNeighEntry 12 } egpNeighIntervalPoll OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The interval between EGP poll command SNMP Working Group [Page 58] RFC 1213 MIB-II March 1991 retransmissions (in hundredths of a second). This represents the t3 timer as defined in RFC 904." ::= { egpNeighEntry 13 } egpNeighMode OBJECT-TYPE SYNTAX INTEGER { active(1), passive(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The polling mode of this EGP entity, either passive or active." ::= { egpNeighEntry 14 } egpNeighEventTrigger OBJECT-TYPE SYNTAX INTEGER { start(1), stop(2) } ACCESS read-write STATUS mandatory DESCRIPTION "A control variable used to trigger operator- initiated Start and Stop events. When read, this variable always returns the most recent value that egpNeighEventTrigger was set to. If it has not been set since the last initialization of the network management subsystem on the node, it returns a value of `stop'. When set, this variable causes a Start or Stop event on the specified neighbor, as specified on pages 8-10 of RFC 904. Briefly, a Start event causes an Idle peer to begin neighbor acquisition and a non-Idle peer to reinitiate neighbor acquisition. A stop event causes a non-Idle peer to return to the Idle state until a Start event occurs, either via egpNeighEventTrigger or otherwise." ::= { egpNeighEntry 15 } -- additional EGP objects egpAs OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The autonomous system number of this EGP entity." ::= { egp 6 } SNMP Working Group [Page 59] RFC 1213 MIB-II March 1991 -- the Transmission group -- Based on the transmission media underlying each interface -- on a system, the corresponding portion of the Transmission -- group is mandatory for that system. -- When Internet-standard definitions for managing -- transmission media are defined, the transmission group is -- used to provide a prefix for the names of those objects. -- Typically, such definitions reside in the experimental -- portion of the MIB until they are "proven", then as a -- part of the Internet standardization process, the -- definitions are accordingly elevated and a new object -- identifier, under the transmission group is defined. By -- convention, the name assigned is: -- -- type OBJECT IDENTIFIER ::= { transmission number } -- -- where "type" is the symbolic value used for the media in -- the ifType column of the ifTable object, and "number" is -- the actual integer value corresponding to the symbol. -- the SNMP group -- Implementation of the SNMP group is mandatory for all -- systems which support an SNMP protocol entity. Some of -- the objects defined below will be zero-valued in those -- SNMP implementations that are optimized to support only -- those functions specific to either a management agent or -- a management station. In particular, it should be -- observed that the objects below refer to an SNMP entity, -- and there may be several SNMP entities residing on a -- managed node (e.g., if the node is hosting acting as -- a management station). snmpInPkts OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of Messages delivered to the SNMP entity from the transport service." ::= { snmp 1 } snmpOutPkts OBJECT-TYPE SYNTAX Counter SNMP Working Group [Page 60] RFC 1213 MIB-II March 1991 ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Messages which were passed from the SNMP protocol entity to the transport service." ::= { snmp 2 } snmpInBadVersions OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Messages which were delivered to the SNMP protocol entity and were for an unsupported SNMP version." ::= { snmp 3 } snmpInBadCommunityNames OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Messages delivered to the SNMP protocol entity which used a SNMP community name not known to said entity." ::= { snmp 4 } snmpInBadCommunityUses OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Messages delivered to the SNMP protocol entity which represented an SNMP operation which was not allowed by the SNMP community named in the Message." ::= { snmp 5 } snmpInASNParseErrs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of ASN.1 or BER errors encountered by the SNMP protocol entity when decoding received SNMP Messages." ::= { snmp 6 } SNMP Working Group [Page 61] RFC 1213 MIB-II March 1991 -- { snmp 7 } is not used snmpInTooBigs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP PDUs which were delivered to the SNMP protocol entity and for which the value of the error-status field is `tooBig'." ::= { snmp 8 } snmpInNoSuchNames OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP PDUs which were delivered to the SNMP protocol entity and for which the value of the error-status field is `noSuchName'." ::= { snmp 9 } snmpInBadValues OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP PDUs which were delivered to the SNMP protocol entity and for which the value of the error-status field is `badValue'." ::= { snmp 10 } snmpInReadOnlys OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number valid SNMP PDUs which were delivered to the SNMP protocol entity and for which the value of the error-status field is `readOnly'. It should be noted that it is a protocol error to generate an SNMP PDU which contains the value `readOnly' in the error-status field, as such this object is provided as a means of detecting incorrect implementations of the SNMP Working Group [Page 62] RFC 1213 MIB-II March 1991 SNMP." ::= { snmp 11 } snmpInGenErrs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP PDUs which were delivered to the SNMP protocol entity and for which the value of the error-status field is `genErr'." ::= { snmp 12 } snmpInTotalReqVars OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of MIB objects which have been retrieved successfully by the SNMP protocol entity as the result of receiving valid SNMP Get-Request and Get-Next PDUs." ::= { snmp 13 } snmpInTotalSetVars OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of MIB objects which have been altered successfully by the SNMP protocol entity as the result of receiving valid SNMP Set-Request PDUs." ::= { snmp 14 } snmpInGetRequests OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Get-Request PDUs which have been accepted and processed by the SNMP protocol entity." ::= { snmp 15 } snmpInGetNexts OBJECT-TYPE SYNTAX Counter SNMP Working Group [Page 63] RFC 1213 MIB-II March 1991 ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Get-Next PDUs which have been accepted and processed by the SNMP protocol entity." ::= { snmp 16 } snmpInSetRequests OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Set-Request PDUs which have been accepted and processed by the SNMP protocol entity." ::= { snmp 17 } snmpInGetResponses OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Get-Response PDUs which have been accepted and processed by the SNMP protocol entity." ::= { snmp 18 } snmpInTraps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Trap PDUs which have been accepted and processed by the SNMP protocol entity." ::= { snmp 19 } snmpOutTooBigs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP PDUs which were generated by the SNMP protocol entity and for which the value of the error-status field is `tooBig.'" ::= { snmp 20 } SNMP Working Group [Page 64] RFC 1213 MIB-II March 1991 snmpOutNoSuchNames OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP PDUs which were generated by the SNMP protocol entity and for which the value of the error-status is `noSuchName'." ::= { snmp 21 } snmpOutBadValues OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP PDUs which were generated by the SNMP protocol entity and for which the value of the error-status field is `badValue'." ::= { snmp 22 } -- { snmp 23 } is not used snmpOutGenErrs OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP PDUs which were generated by the SNMP protocol entity and for which the value of the error-status field is `genErr'." ::= { snmp 24 } snmpOutGetRequests OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Get-Request PDUs which have been generated by the SNMP protocol entity." ::= { snmp 25 } snmpOutGetNexts OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory SNMP Working Group [Page 65] RFC 1213 MIB-II March 1991 DESCRIPTION "The total number of SNMP Get-Next PDUs which have been generated by the SNMP protocol entity." ::= { snmp 26 } snmpOutSetRequests OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Set-Request PDUs which have been generated by the SNMP protocol entity." ::= { snmp 27 } snmpOutGetResponses OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Get-Response PDUs which have been generated by the SNMP protocol entity." ::= { snmp 28 } snmpOutTraps OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "The total number of SNMP Trap PDUs which have been generated by the SNMP protocol entity." ::= { snmp 29 } snmpEnableAuthenTraps OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION "Indicates whether the SNMP agent process is permitted to generate authentication-failure traps. The value of this object overrides any configuration information; as such, it provides a means whereby all authentication-failure traps may be disabled. Note that it is strongly recommended that this object be stored in non-volatile memory so that it remains constant between re-initializations of the network management system." SNMP Working Group [Page 66] RFC 1213 MIB-II March 1991 ::= { snmp 30 } END 7. Acknowledgements This document was produced by the SNMP Working Group: Anne Ambler, Spider Karl Auerbach, Sun Fred Baker, ACC David Bridgham, Epilogue Technology Ken Brinkerhoff Ron Broersma, NOSC Brian Brown, Synoptics Jack Brown, US Army Theodore Brunner, Bellcore Jeff Buffum, HP Jeffrey Buffum, HP John Burress, Wellfleet Jeffrey D. Case, University of Tennessee at Knoxville Chris Chiptasso, Spartacus Paul Ciarfella, DEC Bob Collet John Cook, Chipcom Tracy Cox, Bellcore James R. Davin, MIT-LCS Eric Decker, cisco Kurt Dobbins, Cabletron Nadya El-Afandi, Network Systems Gary Ellis, HP Fred Engle Mike Erlinger Mark S. Fedor, PSI Richard Fox, Synoptics Karen Frisa, CMU Stan Froyd, ACC Chris Gunner, DEC Fred Harris, University of Tennessee at Knoxville Ken Hibbard, Xylogics Ole Jacobsen, Interop Ken Jones Satish Joshi, Synoptics Frank Kastenholz, Racal-Interlan Shimshon Kaufman, Spartacus Ken Key, University of Tennessee at Knoxville Jim Kinder, Fibercom Alex Koifman, BBN SNMP Working Group [Page 67] RFC 1213 MIB-II March 1991 Christopher Kolb, PSI Cheryl Krupczak, NCR Paul Langille, DEC Martin Lee Schoffstall, PSI Peter Lin, Vitalink John Lunny, TWG Carl Malamud Gary Malkin, FTP Software, Inc. Randy Mayhew, University of Tennessee at Knoxville Keith McCloghrie, Hughes LAN Systems Donna McMaster, David Systems Lynn Monsanto, Sun Dave Perkins, 3COM Jim Reinstedler, Ungerman Bass Anil Rijsinghani, DEC Kathy Rinehart, Arnold AFB Kary Robertson Marshall T. Rose, PSI (chair) L. Michael Sabo, NCSC Jon Saperia, DEC Greg Satz, cisco Martin Schoffstall, PSI John Seligson Steve Sherry, Xyplex Fei Shu, NEC Sam Sjogren, TGV Mark Sleeper, Sparta Lance Sprung Mike St.Johns Bob Stewart, Xyplex Emil Sturniold Kaj Tesink, Bellcore Geoff Thompson, Synoptics Dean Throop, Data General Bill Townsend, Xylogics Maurice Turcotte, Racal-Milgo Kannan Varadhou Sudhanshu Verma, HP Bill Versteeg, Network Research Corporation Warren Vik, Interactive Systems David Waitzman, BBN Steve Waldbusser, CMU Dan Wintringhan David Wood Wengyik Yeong, PSI Jeff Young, Cray Research SNMP Working Group [Page 68] RFC 1213 MIB-II March 1991 In addition, the comments of the following individuals are also acknolwedged: Craig A. Finseth, Minnesota Supercomputer Center, Inc. Jeffrey C. Honig, Cornell University Theory Center Philip R. Karn, Bellcore 8. References [1] Cerf, V., "IAB Recommendations for the Development of Internet Network Management Standards", RFC 1052, NRI, April 1988. [2] Rose M., and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based internets," RFC 1065, TWG, August 1988. [3] McCloghrie, K., and M. Rose, "Management Information Base for Network Management of TCP/IP-based internets, RFC 1066, TWG, August 1988. [4] Cerf, V., "Report of the Second Ad Hoc Network Management Review Group", RFC 1109, NRI, August 1989. [5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple Network Management Protocol (SNMP)", RFC 1098, University of Tennessee at Knoxville, NYSERNet, Inc., Rensselaer Polytechnic Institute, MIT Laboratory for Computer Science, April 1989. [6] Postel, J., and J. Reynolds, "TELNET Protocol Specification", RFC 854, USC/Information Sciences Institute, May 1983. [7] Satz, G., "Connectionless Network Protocol (ISO 8473) and End System to Intermediate System (ISO 9542) Management Information Base", RFC 1162, cisco Systems, Inc., June 1990. [8] Information processing systems - Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN.1), International Organization for Standardization, International Standard 8824, December 1987. [9] Information processing systems - Open Systems Interconnection - Specification of Basic Encoding Rules for Abstract Notation One (ASN.1), International Organization for Standardization, International Standard 8825, December 1987. [10] Jacobson, V., "Congestion Avoidance and Control", SIGCOMM 1988, Stanford, California. SNMP Working Group [Page 69] RFC 1213 MIB-II March 1991 [11] Hagens, R., Hall, N., and M. Rose, "Use of the Internet as a Subnetwork for Experimentation with the OSI Network Layer", RFC 1070, U of Wiscsonsin - Madison, U of Wiscsonsin - Madison, The Wollongong Group, February 1989. [12] Rose M., and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based internets", RFC 1155, Performance Systems International, Hughes LAN Systems, May 1990. [13] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple Network Management Protocol", RFC 1157, SNMP Research, Performance Systems International, Performance Systems International, MIT Laboratory for Computer Science, May 1990. [14] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions", RFC 1212, Performance Systems International, Hughes LAN Systems, March 1991. 9. Security Considerations Security issues are not discussed in this memo. 10. Authors' Addresses Keith McCloghrie Hughes LAN Systems 1225 Charleston Road Mountain View, CA 94043 1225 Charleston Road Mountain View, CA 94043 Phone: (415) 966-7934 EMail: kzm@hls.com Marshall T. Rose Performance Systems International 5201 Great America Parkway Suite 3106 Santa Clara, CA 95054 Phone: +1 408 562 6222 EMail: mrose@psi.com X.500: rose, psi, us SNMP Working Group [Page 70]