07-12-2007 02:48 PM
There is a command that will give the console port high priority so that I can access it (with hyperterminal) when the router is under heavy CPU utilization. I have been looking on Google for the last hour and can't figure out what I searched for last time.I believe it was something with scheduling, but I'm not 100% sure.
Does anyone know the command I'm looking for?
Thank you
p.s. The router is suppose to have high CPU utilization.
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07-13-2007 11:36 AM
yjdabear,
I have used this command primarily to restore console access to devices that were having CPU issues to the point the console would lock up. This is a very useful command to troubleshoot high CPU issues.
The scheduler command guarantees some CPU time for all low priority processes and if SNMPGET is one of them it probably should help as well.
HTH
Sundar
07-12-2007 07:34 PM
The command you are looking for is 'scheduler'. High CPU utilization caused by high priority processes can lock up the console and the scheduler command can be used to guarantee CPU time for low priority processes.
Check out this link.
http://www.cisco.com/warp/public/63/why_hang.html
HTH
Sundar
07-13-2007 09:40 AM
Very interesting. Could this be used to free up some CPU cycles on the cat6k so it would respond to snmpgets while processing snmpset?
07-13-2007 11:10 AM
You should also look at things like Control Plane Policing, storm control, etc. Your CPU should never sustain at a utilization that's so high you can't console.
07-13-2007 11:36 AM
yjdabear,
I have used this command primarily to restore console access to devices that were having CPU issues to the point the console would lock up. This is a very useful command to troubleshoot high CPU issues.
The scheduler command guarantees some CPU time for all low priority processes and if SNMPGET is one of them it probably should help as well.
HTH
Sundar
07-16-2007 04:37 AM
Also very useful when you are stress testing the router. Thank you for the replies. That is the exact command I was looking for.
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