[86179] in North American Network Operators' Group
Re: What is multihoming was (design of a real routing v. endpoint
daemon@ATHENA.MIT.EDU (Owen DeLong)
Mon Oct 24 23:04:59 2005
Date: Mon, 24 Oct 2005 20:04:26 -0700
From: Owen DeLong <owen@delong.com>
To: crist.clark@globalstar.com, Stephen Sprunk <stephen@sprunk.org>
Cc: Michael.Dillon@btradianz.com,
North American Noise and Off-topic Gripes <nanog@merit.edu>
In-Reply-To: <435D4495.7050900@globalstar.com>
Errors-To: owner-nanog@merit.edu
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I believe RFC1122 was written in the days when there was a one-to-one
correlation
between IP addresses and interfaces, and, you couldn't have one machine with
multiple addresses on the same network. Obviously, also, we are talking
about
network multihoming, not host multihoming in a NANOG context. It is hard
to perceive a situation where Host Multihoming would require coordination.
Owen
--On October 24, 2005 1:31:17 PM -0700 Crist Clark
<crist.clark@globalstar.com> wrote:
>
> Stephen Sprunk wrote:
> [snip]
>
>>> Other people use this term in very different ways. To some people
>>> it means using having multiple IP addresses bound to a single
>>> network interface. To others it means multiple websites on one
>>> server.
>>
>>
>> That is virtual hosting in a NANOG context. Some undereducated MCSEs
>> might call it multihoming, but let's not endorse that here.
>
> Unfortunately, this is a common and "standards blessed" way to refer to
> any host with multiple interfaces/addresses (real or virtual). For
> example,
> from the "Terminology" section, 1.1.3, of RFC1122, "Requirements for
> Internet Hosts -- Communication Layers," says,
>
> Multihomed
> A host is said to be multihomed if it has multiple IP
> addresses. For a discussion of multihoming, see Section
> 3.3.4 below.
>
> --
> Crist J. Clark crist.clark@globalstar.com
> Globalstar Communications (408) 933-4387
>
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If it wasn't crypto-signed, it probably didn't come from me.
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