[1291] in North American Network Operators' Group
Re: Sprint BGP filters in 207.x.x.x?
daemon@ATHENA.MIT.EDU (Sean Doran)
Sun Dec 17 00:32:42 1995
To: "Daniel M. Barton" <dmbarton@mci.net>
cc: nanog@merit.edu, yakov@cisco.com
In-reply-to: Your message of "Wed, 13 Dec 1995 14:55:11 EST."
<Pine.SUN.3.91.951213145304.18034f-100000@fred.cary.mci.net>
Date: Sun, 17 Dec 1995 00:12:30 -0500
From: Sean Doran <smd@chops.icp.net>
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>>>>> ""Daniel" == "Daniel M Barton" <dmbarton@mci.net> writes:
Daniel> Let me clarify something I incorrectly stated
Daniel> earlier. The MCI provider network
Daniel> (MCI-NETBLKxx) are aggregated into /16s at
Daniel> the borders, not /19s as my earlier note
Daniel> said.
Which is a good thing too, since, as we do closest-exit
routing towards InternetMCI, whether we hear one prefix
in your /14 or 10000, packets will go out the same
direction under normal circumstances.
Anyone wanting to deal with abnormal circumstances
(partitioning of InternetMCI that makes part of a
big aggregate unreachable from a border gateway
announcing the entire aggregate) is welcomed to study
Yakov Rekhter's excellent presentation on the "push"
operation.
Anyone downstream from us wanting to route differently
towards different parts of the big aggregate is welcomed
to study Yakov Rekhter's excellent presentation on
the "pull" operation.
Sean.
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