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- From: evansmp@uhura.aston.ac.uk (Mark Evans)
- Subject: Re: Multiple class 'C' addresses versus single class 'B'
- Message-ID: <1993Jan23.120552.4631@aston.ac.uk>
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- References: <1993Jan23.002517.22830@nosc.mil>
- Date: Sat, 23 Jan 1993 12:05:52 GMT
- Lines: 46
-
- Kent K. Kuriyama (kent@humu.nosc.mil) wrote:
- : I would like to get comments regarding the problems of using multiple
- : class 'C' addresses vice a single class 'B' addresses. Obviously
- : this is an issue because the NIC is hesitant in granting the rapidly
- : diminishing number of class 'B' addresses.
- :
- : We intend to have approximately 2000 IP addresses with typically 50
- : address per sub-net. Using class 'C' address we are looking at 40 sub-
- : nets or approximately 10 'C' addresses.
-
- There is something called supernetting, which is analogeous to subnetting
- which allows a group of class C addresses to be treated as one entity.
-
- :
- : Questions:
- :
- : 1) What kind of management problems will we run into if we use class
- : 'C' vice 'B'? It seems to me that use of multiple class 'C' addresses
- : would not change the number of routers required - the number of sub-nets
- : dictates that.
- :
- : 2) Someone mentioned that linking up a bunch of 'C' addresses will
- : require the use of some external gateway protocol (make sense - we need
- : to route between class 'C' networks) on our routers. Is this a big
- : deal? Is EGP a feature only available on expensive routers?
- :
- : 3) Are there any advantages to getting a contiguous set of class 'c'
- : addresses (e.g. 192.101.190,191,192, . . . etc)?
-
- You do need a continious group for the supeneting, the group must be
- a power of 2 (2,4,8,...)
-
- :
- : 4) Would there be any problem in implementing a single domain name
- : DNS over multiple class 'C' addresses?
- :
- : Thanks.
- :
- : Kent Kuriyama
- : kent@nosc.mil
-
- --
- -------------------------------------------------------------------------
- Mark Evans |evansmp@uhura.aston.ac.uk
- +(44) 21 429 9199 (Home) |evansmp@cs.aston.ac.uk
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