Re: Strange Router CPU Utilisation
Take a look at the following page, it may help you track down the problem. http://www.cisco.com/warp/public/63/highcpu.html Rich -- #--# # Cisco Systems | Richard Gallagher | Office: +32 2 704 5000 # # Euro-CATS | [EMAIL PROTECTED] | Direct: +32 2 704 5421 # #--# "Normal people believe that if it ain't broke, don't fix it. Engineers believe that if it ain't broke, it doesn't have enough features yet." On Jan 27, 4:28am, Hugh Pringle wrote: Subject: Re: Strange Router CPU Utilisation Try doing a sh processes cpu whil the high utilization occurs. This may add some insight to what is causing the high utilization. I ahve seen a misconfigured SNMP server cause a situation similar to this. Hugh Pringle CCNA, CCDA ""Deloso, Elmer G (WPNSTA Yorktown)"" [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Hello, gang. I'd like to know if anyone has seen this behaviour of a 4505 (v.11.2) where it is able to handle heavy traffic throughout the day with no more than a 50% cpu utilisation max but shows a few periods of spikes up to 98% when there is no WAN traffic say 4am or 9pm. These spikes show up as "outgoing" traffic which lasts ~15 to 20 mins on MRTG chart. Nothing shows up on the syslogs. I once tried sniffer before the router "crashed" and all i saw was a build up of ICMP and "other" packets. My guess is this is because the router is not responding to client requests thus it keeps getting a barage of "ICMP". This only shows up on the ethernet ports, i.e. coming in from e0, out e1 in reference to MRTG. Any ideas would help. Thanks. Elmer Deloso _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] -- End of excerpt from Hugh Pringle _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Strange Router CPU Utilisation
Try doing a sh processes cpu whil the high utilization occurs. This may add some insight to what is causing the high utilization. I ahve seen a misconfigured SNMP server cause a situation similar to this. Hugh Pringle CCNA, CCDA ""Deloso, Elmer G (WPNSTA Yorktown)"" [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Hello, gang. I'd like to know if anyone has seen this behaviour of a 4505 (v.11.2) where it is able to handle heavy traffic throughout the day with no more than a 50% cpu utilisation max but shows a few periods of spikes up to 98% when there is no WAN traffic say 4am or 9pm. These spikes show up as "outgoing" traffic which lasts ~15 to 20 mins on MRTG chart. Nothing shows up on the syslogs. I once tried sniffer before the router "crashed" and all i saw was a build up of ICMP and "other" packets. My guess is this is because the router is not responding to client requests thus it keeps getting a barage of "ICMP". This only shows up on the ethernet ports, i.e. coming in from e0, out e1 in reference to MRTG. Any ideas would help. Thanks. Elmer Deloso _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Strange Router CPU Utilisation
Hi, I had several goes at this on Saturday but my outgoing mail was failing. I have found this sort of thing can happen when you get a nasty liitle routing loop and of a "stuck in active". One way to find what is happening could be to do a "show proc cpu" note what processes are happening, wait a minute or so and do it again note what is happening, wait the same period of time and repeat the procedure. Then compare each to see if you can identify what prcess is doing the damage. This is made much easier if you baseline you cpu utilisation. That is, when things are going fie do as above for a comarison of when it is failing. If things are really bad you may need to do the above from the console. If so, check what is going through the console and note any messages fly through there. This may indeed be your problem. Once you know what is be sent to the console do a "no logging console" and check the cpu. With any luck the errors going to the console will be in the log. "show log". It often takes some time to find but the methods above might help. The hardest is the nasty little loop. (Which can be across Nations). Hope this helps, Teunis, Hobart, Tasmania Austalia On Friday, January 19, 2001 at 06:52:58 AM, Deloso. Elmer G (WPNSTA Yorktown) wrote: Hello, gang. I'd like to know if anyone has seen this behaviour of a 4505 (v.11.2) where it is able to handle heavy traffic throughout the day with no more than a 50% cpu utilisation max but shows a few periods of spikes up to 98% when there is no WAN traffic say 4am or 9pm. These spikes show up as "outgoing" traffic which lasts ~15 to 20 mins on MRTG chart. Nothing shows up on the syslogs. I once tried sniffer before the router "crashed" and all i saw was a build up of ICMP and "other" packets. My guess is this is because the router is not responding to client requests thus it keeps getting a barage of "ICMP". This only shows up on the ethernet ports, i.e. coming in from e0, out e1 in reference to MRTG. Any ideas would help. Thanks. Elmer Deloso _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] -- www.tasmail.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Strange Router CPU Utilisation
Hello, gang. I'd like to know if anyone has seen this behaviour of a 4505 (v.11.2) where it is able to handle heavy traffic throughout the day with no more than a 50% cpu utilisation max but shows a few periods of spikes up to 98% when there is no WAN traffic say 4am or 9pm. These spikes show up as "outgoing" traffic which lasts ~15 to 20 mins on MRTG chart. Nothing shows up on the syslogs. I once tried sniffer before the router "crashed" and all i saw was a build up of ICMP and "other" packets. My guess is this is because the router is not responding to client requests thus it keeps getting a barage of "ICMP". This only shows up on the ethernet ports, i.e. coming in from e0, out e1 in reference to MRTG. Any ideas would help. Thanks. Elmer Deloso _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Strange Router CPU Utilisation
How about other port utilization? From the description, it looks like a backup job. Ed _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
