slow console response

[rtaiwo]

I need help resolving an issue with our routers. When i telnet to any of our routers everything goes fast . As soon as i go into enable mode and issue a Show run command then the output slows down. it takes an average of 15 - 18second before you can start seing your configuration on the router. this is very frustrating.

[Georg Pauwen]

Hello,

can you check if the CPU utilization on your routers is high ? If so, this could explain the slow telnet response. Issue the command ´show proc cpu´ to verify what the actual utilization is.

Regards,

GP

[rtaiwo]

Thanks for your input. my cpu utilization is as follows

CPU utilization for five seconds: 1%/1%; one minute: 0%; five minutes: 3%

[Richard Burts]

Am I correct in understanding that your issue is the delay at the beginning of show run? Or is the slowness more general than that?

As an experiment compare the response time when you do show run with the response time when you do show start. They are both displaying configuration data. But the startup config is a text file and the response time to begin display of it should be quick. The running config is actually a dynamic binary data structure. What happens is that when you do show run the software must examine the binary data structure and construct the text that reflects it. This is what causes the delay in beginning of show run.

As a side note the delay in beginning show run should be about the same amount of time as it takes to do copy run start (since that also must examine the binary data structure and construct the text that represents it).

HTH

Rick

[rtaiwo]

Rick when I do the sh start the response was immediate compared to sh run that takes anywhere between 15 - 18 seconds. yes the delay is at the beginning of the sh run and not when telnetting to the routers.

[Richard Burts]

It may be frustrating but there is not anything that you can do about that amount of delay at the beginning of show run. As I explained the software must analyze the binary data structure and build the text that represents it and it takes that amount of time to do the work.

HTH

Rick