[126782] in North American Network Operators' Group
Re: Junos Asymmetric Routing
daemon@ATHENA.MIT.EDU (Kevin Oberman)
Sun May 30 13:16:33 2010
To: Randy Bush <randy@psg.com>
In-reply-to: Your message of "Sun, 30 May 2010 18:39:39 +0200."
<m2hblppcms.wl%randy@psg.com>
Date: Sun, 30 May 2010 10:16:14 -0700
From: "Kevin Oberman" <oberman@es.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> Date: Sun, 30 May 2010 18:39:39 +0200
> From: Randy Bush <randy@psg.com>
>
> > your perfectly fine multihop BGP session could break when rerouting
> > occurs.
>
> one of the many reasons that there are no perfectly fine multi-hop bgp
> sessions.
I remember a posting to this list back in the late 90s from Tony Li, who
knows a bit about BGP. He urged that multi-hop BGP never be used and
pointed out that it had not been intended for use except as a test tool,
not a production one and should have been stripped from IOS before it
was shipped.
While there are a few good cases for using it, it is generally a bad,
bad idea. And this thread demonstrates that he had reason for the warning
--
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751
