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Cisco Router Bandwidth Check?

Posted on 2009-12-16
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Last Modified: 2012-05-08
On my Cisco 1841 router I am checking my bandwidth, which shows:
 5 minute input rate 260000 bits/sec, 35 packets/sec
 5 minute output rate 47000 bits/sec, 27 packets/sec

I checked this during these slow spikes we've been getting once in a while.  We have a 10Mbit connection... symmetrical (thats the word, right? If I have 10MBit up and down?)

Is this congested? Or is this ISP related? Can anyone lend a hand in further troubleshooting?
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Question by:elanops
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by:Don Johnston
ID: 26067610
260,000 bps on a 10,000,000 circuit?

No, that's not congested. That's a utilization of 2.6%

The next time you have a slowdown, clear the counters on the interface and then show the counters. Then show the counters again after a couple minutes and post the output here.
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by:elanops
ID: 26067733
I figured as much.  I rebooted the router and it was considerably faster than before.  What could have caused this?
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by:Don Johnston
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ID: 26067775
Hard to say without seeing the counters. It would also help to see the output of a "show process cpu" and "show process memory" during the slowdown.
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by:elanops
ID: 26067864
The output of show process cpu is massive.  Will this suffice?:
CPU utilization for five seconds: 1%/0%; one minute: 2%; five minutes: 3%
show process memory:
Processor Pool Total:  188642816 Used:   25857188 Free:  162785628
      I/O Pool Total:   28311552 Used:    4156400 Free:   24155152

This is obviously different than before I rebooted the router, but I'm guessing one of these 2 was choking?  How do I kill processes on a cisco router if this happens again?
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by:Don Johnston
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ID: 26067969
Unfortunately, you can't tell much without looking at the individual processes to see which one is eating up the CPU cycles and memory.

And you can't kill individual processes.
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by:elanops
ID: 26068013
If I can't kill individual processes, what is my best possible solution next time this happens If I don't want any downtime?
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Don Johnston earned 1000 total points
ID: 26068622
If you can determine what the process is (if it is a process) then you can determine the fix. (upgrade the IOS, add more memory, don't run the process to begin with, etc.).
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