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

[arulgobinath emmanuel]

Hi,

I don't have any idea reading IP Multicast Dat
But this is consuming only ~5% according to your report .
Can you post following output so we can isolate whether  high cpu due to
packet interrupt or processes.
show proc cpu | exc 0.00%  0.00%  0.00%
CPU utilization for five seconds: 7%/2% *( Interrupt/process)*; one minute:
7%; five minutes: 7%

can you see any correlation with data rate with high processing (during the
time span) ?

Best Regards,
Gobinath.



On Fri, Apr 15, 2011 at 2:26 PM, LM <asturluismi at gmail.com> wrote:

> 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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