[184871] in North American Network Operators' Group
Re: IGP choice
daemon@ATHENA.MIT.EDU (Pablo Lucena)
Fri Oct 23 15:36:16 2015
X-Original-To: nanog@nanog.org
In-Reply-To: <E0D94351C6498041ABE98D73FB9F30EA138CAC35@cmailbox5>
From: Pablo Lucena <plucena@coopergeneral.com>
Date: Fri, 23 Oct 2015 15:35:54 -0400
To: "Jameson, Daniel" <Daniel.Jameson@tdstelecom.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
> A lot of carriers use ISIS in the core so they can make use of the'
> overload bit' with a 'set-overload-bit on-startup wait-for-bgp". Keeps
> them from black holing Traffic while BGP reconverges., when you have
> millions of routes to converge it can take forever. It's also a really
> handy tool when you're troubleshooting or repairing a link, set the OL
> bit, and traffic gracefully moves, then when you're done it gracefully
> moves back. You can do the same thing with the Metric, and Cost in OSPF=
,
> just not quite as elegant.
>
=E2=80=8BThat feature is also present in OSPF. 'max metric router-lsa'. =E2=
=80=8B
