[148811] in North American Network Operators' Group
Populating BGP from Connected or IGP routes
daemon@ATHENA.MIT.EDU (Eric C. Miller)
Mon Jan 23 15:52:43 2012
From: "Eric C. Miller" <eric@ericheather.com>
To: "nanog@nanog.org" <nanog@nanog.org>
Date: Mon, 23 Jan 2012 20:46:49 +0000
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi all,
I'm looking for a best practice sort of answer, plus maybe comments on why =
your network may or may not follow this.=20
First, when running a small ISP with about the equivilent of a /18 or /19 i=
n different blocks, how should you decide what should be in the IGP and wha=
t should be in BGP? I assume that it's somewhere between all and none, and =
one site that I found made some good sense saying something to the followin=
g, "Use a link-state protocol to track interconnections and loopbacks only,=
and place all of the networks including customer networks into BGP."
Secondly, when is it ok, or preferable to utilize "redistribute connected" =
for gathering networks for BGP over using a network statement? I know that =
this influences the origin code, but past that, why else? Would it ever be =
permissible to redistribute from the IGP into BGP?
Thanks for everyone's input!
Eric Miller=
