[109159] in North American Network Operators' Group
Re: ECN
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Fri Nov 7 06:06:41 2008
Date: Fri, 7 Nov 2008 12:04:12 +0100 (CET)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: nanog@nanog.org
In-Reply-To: <gf10ti$i4k$1@ger.gmane.org>
Errors-To: nanog-bounces@nanog.org
On Fri, 7 Nov 2008, David Freedman wrote:
> Implementing this in an MPLS core is not an easy task, you can really
> only do this on the edge, when the MPLS labelled packet arrives at an
> LSR, we don't know if it contains a TCP segment or not (fancy deep h/w
> implementations excluded), all we know is that , if there is congestion,
> we can discard it based on the EXP bits in the shim.
I did some more checking and neither 12000 (IOS) nor CRS-1 seems to
support WRED with ECN (at least the command doesn't show when I create a
policy-map), so I'm going to ping my Cisco SE and hear about what's going
on.
--
Mikael Abrahamsson email: swmike@swm.pp.se
