The simplest way to get this info is to use the following commands:
1. sh interface (on the interfaces connected to the remote routers)
2. sh cpu proc history
These would be a very good to begin with.
Also, do you have LMS (or any other SNMP Manager) in your network, if yes, please try to you that, otherwise, you may download SolarWinds (Eval edition, and if you find ok, you may purchase lic.) or if you are a Linux fan, MRTG would be also a great bet.
You can use SNMP based tool to monitor device performance. This is the most convenient way to get these data from router. There are plenty of these tools available on web(some are free).Just allow snmp polling from this tool in your router and tool will give you data in graphical manner without issuing command on router.
Or else use following command to get the data from your router itself.
sh proc cpu history - use this command to get CPU load
sh interface - use this command on your interfaces to see any error/discard/drops
i think whatever GUI i use(like LMS), they won't get me anythink more than i can get from CLI right? bcs i have only one day on site and have no time to learn using that program. i am familiar with CLI so i prefer to use commands you gave me.
sh proc cpu history can give avarage and maximum CPU utilization for the period of 60 sec,60 min & 72 hours. Also for the lost(drop) packets, you can see input and output drop on interface using 'sh int ' command.
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