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- .\" Copyright 1989 by Carnegie Mellon University
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- .\" WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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- .\" Copyright (c) 1983 The Regents of the University of California.
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- .\" Redistribution and use in source and binary forms are permitted
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- .\" by the University of California, Berkeley. The name of the
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- .\" @(#)snmpnetstat.1 6.8 (Berkeley) 9/20/88; rev LL and JJ, 6/10/92
- .\"
- .TH SNMPNETSTAT 1C "September 17, 1989"
- .UC 5
- .SH NAME
- snmpnetstat \- show network status using SNMP
- .SH SYNOPSIS
- .B snmpnetstat
- .RB [\| \-an \|]
- .RB [\| \-c
- .IR community \|]
- .I host
- .br
- .B snmpnetstat
- .RB [\| \-inrs \|]
- .RB [\| \-c
- .IR community \|]
- .I host
- .br
- .B snmpnetstat
- .RB [\| \-n \|]
- .RB [\| \-I
- .IR interface \|]
- .RB [\| \-c
- .IR community \|]
- .I host
- .RI [\| interval \|]
- .br
- .B snmpnetstat
- .RB [\| \-p
- .IR protocol \|]
- .RB [\| \-c
- .IR community \|]
- .I host
- .RI [\| interval \|]
- .SH DESCRIPTION
- The
- .I snmpnetstat
- command displays the values
- of various network-related information
- retrieved from a remote system using the SNMP protocol.
- There are a number of output formats,
- depending upon the options for the information to be presented.
- The first form of the command displays a list of active sockets.
- The second form presents the values of other network-related
- information according to the option selected.
- Using the third form, with an
- .I interval
- specified,
- .I snmpnetstat
- will continuously display the information regarding packet
- traffic on the configured network interfaces.
- The fourth form displays statistics about the named protocol.
- .PP
- The
- .I host
- specification may be either a host name or an internet address
- specified in ``dot notation''.
- .PP
- The options have the following meaning:
- .TP
- .B \-a
- With the default display,
- show the state of all sockets; normally sockets used by
- server processes are not shown.
- .TP
- .BI \-c "\0community"
- Set the community name to use in the SNMP transactions.
- If no community is specified, ``public'' is used.
- .TP
- .B \-i
- Show the state of all of the interfaces.
- .TP
- .BI \-I " interface"
- Show information only about this interface;
- used with an
- .I interval
- as described below.
- .TP
- .B \-n
- Show network addresses as numbers (normally
- .I snmpnetstat
- interprets addresses
- and attempts to display them symbolically).
- This option may be used with any of the display formats.
- .TP
- .BI \-p " protocol"
- Show statistics about
- .IR protocol ,
- which is either a well-known name for a protocol
- or an alias for it.
- Some protocol names and aliases are listed in the file
- .IR /etc/protocols .
- A null response typically means
- there are no interesting numbers to report.
- The program will complain if
- .I protocol
- is unknown
- or if there is no statistics routine for it.
- .TP
- .B \-s
- Show per-protocol statistics.
- .TP
- .B \-r
- Show the routing tables.
- When
- .B \-s
- is also present,
- show routing statistics instead.
- .PP
- The default display
- for active sockets
- shows the local and remote addresses, protocol,
- and the internal state of the protocol.
- Address formats are of the form ``host.port'' or ``network.port''
- if a socket's address specifies a network but no specific host address.
- When known,
- the host and network addresses are displayed symbolically
- according to the data bases
- .I /etc/hosts
- and
- .IR /etc/networks ,
- respectively.
- If a symbolic name for an address is unknown,
- or if the
- .B \-n
- option is specified,
- the address is printed numerically,
- according to the address family.
- For more information regarding the Internet ``dot format,''
- refer to
- .IR inet (3N).
- Unspecified
- (or ``wildcard'') addresses and ports appear as ``*''.
- .PP
- The interface display provides a table of cumulative statistics
- regarding packets transferred, errors, and collisions.
- The network addresses of the interface
- and the maximum transmission unit (``mtu'') are also displayed.
- .PP
- The routing table display indicates
- the available routes and their status.
- Each route consists of a destination host or network
- and a gateway to use in forwarding packets.
- The flags field shows
- the state of the route (``U'' if ``up''),
- whether the route
- is to a gateway (``G''),
- whether the route was created dynamically
- by a redirect (``D''),
- and whether the route has been modified
- by a redirect (``M'').
- Direct routes are created
- for each interface attached to the local host;
- the gateway field for such entries
- shows the address of the outgoing interface.
- The interface entry indicates
- the network interface utilized for the route.
- .PP
- When
- .I snmpnetstat
- is invoked with an
- .I interval
- argument,
- it displays a running count of statistics
- related to network interfaces.
- This display consists of a column
- for the primary interface
- and a column summarizing
- information for all interfaces.
- The primary interface may be replaced
- with another interface by specifying the
- .I \-I
- option.
- The first line of each screen of information
- contains a summary since the system was last rebooted.
- Subsequent lines of output show values accumulated
- over the preceding interval.
- .SH SEE ALSO
- hosts(5),
- iostat(1),
- networks(5),
- protocols(5),
- services(5),
- snmp(1),
- snmpd(8),
- vm_stat(1),
- RFC1067
- .SH BUGS
- The notion of errors is ill-defined.
-