[189010] in North American Network Operators' Group
Re: Friday's Random Comment - About: Arista and FIB/RIB's
daemon@ATHENA.MIT.EDU (Nick Hilliard)
Fri Apr 29 16:25:22 2016
X-Original-To: nanog@nanog.org
X-Envelope-To: nanog@nanog.org
Date: Fri, 29 Apr 2016 21:25:14 +0100
From: Nick Hilliard <nick@foobar.org>
To: Baldur Norddahl <baldur.norddahl@gmail.com>
In-Reply-To: <CAPkb-7CJoRiKk2K4zVcHor_5V1HRpwTRmUgWuSrPHbaGvd1MDQ@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
Baldur Norddahl wrote:
> With two uplinks that is highly unlikely to the point of being impossible.
> There is no topology change upstream that can cause a situation where it is
> not possible to do a high degree of aggregation of the full default free
> routing table before loading it in the FIB.
which is why I qualified this in a previous posting:
> The more paths you receive from different sources, the more likely it
> is that this list of 120k "superfluous" prefixes will converge
> towards zero.
Agreed that small numbers of paths are most unlikely to create the
conditions for this problem to occur.
Nick
