Cisco 2650 Latency

Unanswered Question
Aug 6th, 2007
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There are 2 interfaces (fa 0/0 and atm 0/0) The atm interface shows 178/255 during business hours. The highest process was .39% in 5 minutes (CEF). How do I determine whether this is traffic, old hardware, or other?

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Overall Rating: 3.5 (2 ratings)
paolo bevilacqua Mon, 08/06/2007 - 08:53
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Can you explain ? Looks normal to me ?

gdrandles Mon, 08/06/2007 - 08:57
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All of the remote locations are connected back here via ATM T1. There are about 350 users at the remote building. The latency just became a problem a week ago. Each remote site is the same (2650 edge to ATM T1 cloud). Other sites with similar number of users show rx 77/255 and not causing a noticable latency problem.

guruprasadr Mon, 08/06/2007 - 08:58
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Value you have mentioned as 178/255 is that a reliability value ? ?. It means then you will have to contact your Service Provider immediately for this Issue. May be because of this poor reliability in Router you will face Huge CRC occurance and Latency Issues frequently.

Whereas, if you could post the output of "show processes cpu" command it will helpful to determine and provide you the resolution for 39% in 5 Mins (CEF) ? ?

Also, let us know what is the error you are getting because of this High CPU process.


Best Regards,

Guru Prasad R

gdrandles Mon, 08/06/2007 - 09:04
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I put the CPU information in earlier because I didn't want to miss something. I haven't seen anything that would make me think it was the CPU causing the router to have slow download speeds. The number 178/255 is the rx. I have attached the interface and processes info.



paolo bevilacqua Mon, 08/06/2007 - 09:12
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Hi, looks normal to me, the 2600 is not so much powerful moreover you have "fancy queueing" enabled.

If you see drops, input drops, ignores, then it would another matter, but I don't see that in your output. Just make sure "ip cef" is enabled and the 2600 will do the best it can.

Hope this helps, please rate post if it does!

gdrandles Mon, 08/06/2007 - 09:16
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Thanks for the information and IP CEF is enabled:

ip subnet-zero

no ip source-route

ip cef

I guess I will look into getting another router or upgade the existing one.


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