Measure / Analyze traffice on a 17xx router

[andrewleki]

Hi,

I've got a cisco 17xx router with a 2MB connection and some branch offices connected with VPN tunnels to this router.

Since a few days we have some annoying delays.

Since the router is the only device between the LAN and the internet, what commands can I use to analyze the traffic going to the router?

Regards,

[peterledwidge]

If you suspect congestion on the Internet link

check for utilization and errors.

sh int serial x

to clear counters

clear counters serial x

check the router logs for any interface flaps.

sh log | i Serial

Run some ping sweeps between sites to see if there is

packet loss on a particular connection.

Also check the local LAN interface to ensure it's operating correctly.

[jroyster]

Also check processor utilization with "show proc cpu"

If IPsec is being done in software on the router it can really slow it down with even moderate traffic loads.