Re: BGP-4 usage document (revised)

Curtis Villamizar <curtis@ans.net> Mon, 16 January 1995 22:07 UTC

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Message-Id: <199501162135.QAA00997@curtis.ansremote.com>
To: kannan@catarina.usc.edu
Cc: curtis@ans.net, bgp@ans.net
Reply-To: curtis@ans.net
Subject: Re: BGP-4 usage document (revised)
In-Reply-To: Your message of "Mon, 16 Jan 1995 11:31:22 PST." <9501161931.AA22694@catarina.usc.edu>
Date: Mon, 16 Jan 1995 16:35:22 -0500
Sender: ietf-archive-request@IETF.CNRI.Reston.VA.US
From: Curtis Villamizar <curtis@ans.net>

In message <9501161931.AA22694@catarina.usc.edu>, kannan@catarina.usc.edu write
s:
> 
> Let me give an example:  Assume that site X is given 10.0 through 10.127,
> and site Y is given 10.128 through 10.255.  Both sites X and Y are
> misconfigured.  Then the current implementations will aggregate these
> advertisements to net 10, and the routing system sees two
> advertisements, 10 via site X, and 10 via site Y.

Right.  I lost the original context in my posting here and started
rambling about proxy aggregation in general but regained consciousness
by the end of the message.  :-)

[...]

> > Back to the original point- I agree with the point that no transit
> > provider should be proxy aggregating without examining the
> > consequences and also exhausting attempts to get the originator to
> > aggregate in the first place.  Therefore the default behaviour will
> > break things in subtle ways.
> 
> Yes, but the default behaviour has its uses, as Paul and Dimitry
> pointed out.  The BGP-4 editors should probably relegate the offending
> paragraphs to a footnote, or the "changes from the previous version"
> section.
> 
> Kannan

We all seem to agree on this.

Curtis