Router is getting slow

alex goshtaei · ‎02-02-2009

Hi All,

we are using 2801 ISR, every night at 9:00 PM, router gets very slow and almost we lose connection. I've contacted serivce provider and they mentioned connection is OK. what's the best tool to monitor bandwidth and traffic to pin point exact problem?

I've planned to use NetFlow.

thanks

Alex

Leo Laohoo · ‎02-02-2009

You sure no scheduled backups are happening at this time daily?

If it's slow every 9pm, then I'd suggest you do a packet sniffing to find out traffic status.

sean_evershed · ‎02-02-2009

Have you checked the CPU and memory use as well on the router?

What sort of connection do you have to your service provider?

alex goshtaei · ‎02-03-2009

Hi,

no, I have not checked memory or CPU. we have T1 connection which is connected to fa0/1 interface. I run netflow and "ip accounting" on external interface. with "show ip acccounting" and "show ip cache flow", I haven't seen any unusual traffic. do you think the problem is because of SP bandwidth issue?

thanks

Alex

vishwancc · ‎02-03-2009

Hi Agos,

U said

"router gets very slow and almost we lose connection "

are u saying u loose connection to the router when accessing it remotely or connection to internet.

If u are loosing connection to the internet u could probably check for the CPU utilization at that time , check if u are not using any tool (Cisco work or snmp) to pull up configuration at that time ,share the logs like cpu utilization ,memory utilization at the time of high cpu,share the interface statics as well.

Chao

Vishwa

alex goshtaei · ‎02-03-2009

thanks,

I'll capture log file tonight and post it in forum.

Leo Laohoo · ‎02-03-2009

What's the IOS and feature set you are running?

I assume that no scheduled backup happens at that particular time?