[88187] in North American Network Operators' Group
Re: Split flows across Domains
daemon@ATHENA.MIT.EDU (Joe Abley)
Tue Jan 24 13:11:40 2006
In-Reply-To: <3DFF80EF-2BDE-4254-AFF6-97E9B28DC867@isc.org>
From: Joe Abley <jabley@isc.org>
Date: Tue, 24 Jan 2006 13:09:10 -0500
To: NANOG list <nanog@merit.edu>
Errors-To: owner-nanog@merit.edu
On 24-Jan-2006, at 13:05, Joe Abley wrote:
> On 24-Jan-2006, at 12:07, Robert E.Seastrom wrote:
>
>> He said "via two different autonomous domains", which I took to mean
>> two upstreams... and my understanding is that (on ciscos anyway)
>> you're talking per-packet, not per-flow load balancing.
>
> If you can get two candidate routes for the same destination into
> the FIB, then you'll get per-flow load balancing as long as CEF is
> running, no?
(Substitute "other, similar, hash-based ECMP route selection schemes"
for CEF, for routers not made by cisco. Apologies for my transient
lapse into assumptions about vendor choice. And also for replying to
my own mail. If anybody needs me, I'll be standing in the corner
looking embarrassed.)
