[139377] in North American Network Operators' Group
Re: LAGing backbone links
daemon@ATHENA.MIT.EDU (Nick Hilliard)
Tue Apr 5 15:06:17 2011
X-Envelope-To: <nanog@nanog.org>
Date: Tue, 05 Apr 2011 20:05:59 +0100
From: Nick Hilliard <nick@foobar.org>
To: nanog@nanog.org
In-Reply-To: <96CD3DAF-2EB7-42A2-B3AD-32F1F41BB588@castlepoint.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 05/04/2011 16:30, Shane Amante wrote:
> 1) Be mindful of the number of component-links you can put into a
> single LAG. This varies by platform. In general, for higher-end
> routers/switches the minimum number of component-links in a single
> LAG is 16.
Some older equipment will unequally prefer certain links over others,
depending on the number of members in the LAG. I.e. a 2-member LAG
might load balance equally under ideal conditions, but a 3-member LAG
might naturally load balance 2:2:1. This is particularly a problem if
you have, say an 8-member LAG and you lose a single member, which could
drop your overall throughput to the total of 4 members.
Nick
