[135928] in North American Network Operators' Group
Re: Strange L2 failure
daemon@ATHENA.MIT.EDU (Herro91)
Sun Jan 30 21:04:38 2011
In-Reply-To: <4D44D596.3070707@brightok.net>
Date: Sun, 30 Jan 2011 21:03:19 -0500
From: Herro91 <herro91@gmail.com>
To: Jack Bates <jbates@brightok.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
I had an issue on the 28xx with a static NAT that just stopped working. The
router would not publish the MAC for the nat entry. I removed the NAT entry
and reapplied - and magically it worked again.
On Sat, Jan 29, 2011 at 10:05 PM, Jack Bates <jbates@brightok.net> wrote:
> On 1/29/2011 8:47 PM, ML wrote:
>
>> I just ran into something like this yesterday. A Belkin router with a MAC
>> of 9444.52dc.XXXX was properly learned at the IDF switch but the upstream
>> agg switch/router wouldn't learn it. I even tried to static the MAC into
>> the CAM..router refused.
>>
>
> That's what really tripped me out, was that the router actually did place
> an ARP entry and pretended like everything should be working. Scheduling
> some more direct tests with packet sniffers next week when I get back in the
> office.
>
> I'm curious now if IOS has the issue or the line card, so we'll test off
> different cards direct and monitor results.
>
> Jack
>
>
