nanog mailing list archives

Re: Shim6 vs PI addressing


From: Jared Mauch <jared () puck nether net>
Date: Thu, 2 Mar 2006 09:37:12 -0500


On Wed, Mar 01, 2006 at 03:01:22PM -0800, Owen DeLong wrote:
    I think you're missing that some people do odd
things with their IPs as well, like have one ASN and 35
different sites where they connect to their upstream Tier69.net
all with the same ASN.  This means that their 35 offices/sites
will each need a /32, not one per the entire asn in the table.

People who are doing that have not read the definition of the
term ASN and there is no reason that the community or public
policy should concern itself with supporting such violations
of the RFCs.  An AS is a collection of prefixes with a consistent
and common routing policy.  By definition, an AS must be a
contiguous collection of prefixes or it is not properly a
single AS.  Using the same ASN to represent multiple AS is
a clear violation.

It doesn't fit the RFC definition of AS.  Therefore, there is no
reason to support such usage on a continuing basis.  You violate
the RFC's you takes your chances.

        I guess all those root servers that use the same asn
but connect to different networks (anycast) should get shut down
quickly.

        This is a part of networking life today in the v4 space,
and without any current changes, it will (is) the same in v6
routing as there is nothing different except a few more bits 32 => 128.

        No new routing protocol, nothing, except this shim6 thing
which people don't seem interested in because it means network
operators can't do the traffic engineering they need to.

        - jared

-- 
Jared Mauch  | pgp key available via finger from jared () puck nether net
clue++;      | http://puck.nether.net/~jared/  My statements are only mine.


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