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

LM asturluismi at gmail.com
Fri Apr 15 04:56:00 EDT 2011


No, no ACLs with logging option configured at all.

Regarding the commmand, I tried before I sent the email to the list and...

#sh proc cpu sort
                          ^
% Invalid input detected at '^' marker.

So it is not supported so far.
Anyway I took note about this  process:
   50   118994168 277418196        428  3.35%  4.33%  4.88%   0 IP 
Multicast Dat

But I can't find yet an explanation.
Does anyone here know what is that process doing exactly?


El 14/04/11 16:24, Bill Blackford escribió:
> 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?
>>>
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>
>


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