[c-nsp] RES: Cisco 2960G Issue

[Leonardo Gama Souza]

Hi Mike,

I´ve never run into this issue before. I presume this is not a common problem.
You can start troubleshooting with 'show platform port-asic' and 'show platform tcam'.
There are also other 'show platform' and 'show controller' commands that might be useful.

Regards,
Leonardo Gama.

-----Mensagem original-----
De: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] Em nome de Mike Cooper
Enviada em: quarta-feira, 27 de agosto de 2008 06:39
Para: cisco-nsp at puck.nether.net
Assunto: [c-nsp] Cisco 2960G Issue

Hi all,

I've got a WS-C2960G-24TC-L switch running IOS 12.2(35)SE5

It's been in production for a couple of weeks in a fairly straight forward L2 environment.

We noticed this afternoon a few hosts connected to the switch suffering persistent packet loss of ~20%

After a bit of investigation we narrowed it down to ports 5, 6, 7, 8. 
The ports were configured as access ports, 1 @ 10M/FD 3 @ 1G/FD, all were in different vlans. My assumption is the switch runs six ASICs, and that the one that operates those 4 ports has faulted or degraded in some way causing the performance issues.

None of the other machines connected to the switch were affected, and currently the switch is still operating.

I've since relocated the affected machines to an alternate switch, resolving the loss issues.

I'm interested if anyone is aware of this as a common problem with 2960G switches (or any switches for that matter), and if there are any tips for testing/troubleshooting before I return it as faulty. I bought 4 brand new 2960Gs in one go, 1 was DoA, and now this one has developed faults which is leaving me with some concerns for the others.

Cheers,

--Mike
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