>Hello good guys of the group, can anyone with the knowledge of ip/31, help me?
>please.
>
>I need to know what it is use for, and how it works, pls.
>
>Thanks in advance,
>
>Michael Taiwo.
Historically, /31 addresses, with a subnet mask of 255.255.255.254,
were not usable because they only had two addresses, and these
addresses were taken up for reserved values. There has been a
rethinking of the problem (see below), but I have no idea of the
implementation status in IOS. You will see that a couple of the
authors work for Cisco.
RFC 3021
Title: Using 31-Bit Prefixes on IPv4 Point-to-Point Links
Author(s): A. Retana, R. White, V. Fuller, D. McPherson
Status: Standards Track
Date: December 2000
Mailbox: [EMAIL PROTECTED], [EMAIL PROTECTED],
[EMAIL PROTECTED], [EMAIL PROTECTED]
Pages: 10
Characters: 19771
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-retana-31bits-03.txt
URL: ftp://ftp.isi.edu/in-notes/rfc3021.txt
With ever-increasing pressure to conserve IP address space on the
Internet, it makes sense to consider where relatively minor changes
can be made to fielded practice to improve numbering efficiency. One
such change, proposed by this document, is to halve the amount of
address space assigned to point-to-point links (common throughout the
Internet infrastructure) by allowing the use of 31-bit subnet masks
in a very limited way.
This is now a Proposed Standard Protocol.
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