[c-nsp] 2950 and multicast, a cpu issue?

[Bill Blackford]

This might have been suggested and if so, my apologies for the noise.

Have you tried 'sh proc cpu sorted'? This will display the highest hog on top.

Are you logging ACL's? I ran into this as my rancid cron would hit my
gear at prescribed intervals *and* and I was logging the acl applied
to the line vty.

Also, the 29xx series seem to run very high with CPU as compared to
the 36xx counter parts. The LED's take up cycles, configured VLANS,
etc.

-b

On Thu, Apr 14, 2011 at 7:16 AM, LM <asturluismi at gmail.com> wrote:
> No, the SVI is just for management and the only multicast is the VRRP from
> the firewalls.
> I dont see this behaviour in other 2950 with the SVI in the same vlan, also
> all of the 2950s run the same IOS.
> Configuration is based on template, so looks like it is not that neither.
> For the "strange" switch and its cpu behaviour more defails are...
> Traffic peak is around 13mpbs
> Vlans configured: 5 (most of them for multicast traffic only)
> VTP: transparent
> STP: rstp
>
> I checked ARP and seems to be ok so far
>
> ideas?
>
> El 12/04/11 19:53, Christopher.Marget at usc-bt.com escribió:
>>>>
>>>> sw2950 running c2950-i6q4l2-mz.121-22.EA13
>>>> Is normal the cpu behaviour? I attached an image, I hope it wont be
>>>
>>> removed
>>>>
>>>> switch is just managing multicast traffic
>>>> http://postimage.org/image/2hp8nccw4/
>>>
>>> You should try "show proc cpu" during peak periods to see what processes
>>> are active. Off the top of my head I can't think of any
>>> "misconfiguration" on a 2950 that would cause this kind of load.
>>
>> L3 multicast traffic in the VLAN where the 2950's management SVI lives?
>>
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>



-- 
Bill Blackford
Network Engineer

Logged into reality and abusing my sudo privileges.....