[32564] in North American Network Operators' Group
Re: MACs on PAIX
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Wed Nov 29 08:51:42 2000
Date: Wed, 29 Nov 2000 08:49:15 -0500
From: Leo Bicknell <bicknell@ufp.org>
To: nanog@merit.edu
Message-ID: <20001129084914.A72892@ussenterprise.ufp.org>
Mime-Version: 1.0
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In-Reply-To: <3A240685.3DC4F241@globix.net>; from Matt Hempel on Tue, Nov 28, 2000 at 02:24:53PM -0500
Errors-To: owner-nanog-outgoing@merit.edu
On Tue, Nov 28, 2000 at 02:24:53PM -0500, Matt Hempel wrote:
> I'm using MAC accounting on our Fast E connection at the PAIX to do
> per-peer traffic stats. It worked great until we put in a GSR. I don't
> know why it worked before or if anything has changed since.
When Cisco released the GSR platform, the dropped MAC accounting
from the requirements on all their ethernet boards for that platform.
While you could turn it on, the counters were meaningless, sometimes
showing you nothing, often showing packets on the wrong bucket. The short
story is that "processor switched" packets were counted correctly, but
there was no implementation for "ASIC switched" packets, and so they
incremented some generic counter.
Several people, including myself made a big stink about this
issue. My biggest complaint was if they weren't going to implement it,
then you shouldn't be able to configure it in the CLI, but that said,
it should be implemented. Fortunately Cisco was helpful, and decided
to work on implementing it.
Support for the 1xGE card was added in 12.0(11) I believe. They
just added support for the 3xGE card in 12.0(13). I have never asked
myself about the FE cards, but they should be more or less the same
issue.
If you're not on fairly recent code I recomend trying an upgrade
and seeing if that fixes your problem. If not, you should open a tac
case for the bug "mac accounting can be configured on FE, but does not
work". If you can't get some good answers e-mail me and I'll poke some
of the people we've been working with.
--
Leo Bicknell - bicknell@ufp.org
Systems Engineer - Internetworking Engineer - CCIE 3440
Read TMBG List - tmbg-list-request@tmbg.org, www.tmbg.org
