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New Member

There is any command to see traffic by my router

May I use debug to see IP sources and destination, ports and protocols?

3 REPLIES
Cisco Employee

Re: There is any command to see traffic by my router

"debug ip packet detail" will tell you but DON'T turn on that as its very very DANGEROUS. It is very very cpu intensive, It will spike the cpu of a router to 100% and crash the router.

If you want to moniter the traffic, create the access-list and moniter based on source or destination network.

Silver

Re: There is any command to see traffic by my router

You can also turn the ip accounting on but that will only show you source and destination IPs and bytes tranferred. For port numbers and other detailed info you should use some Sniffer.

Thanks.

Re: There is any command to see traffic by my router

If you go with a command on the router (eg debug ip packet x detail or ip accounting), it will cause performance issues/load. But it will work and it's free. One non-intrusive non-free method you could use is place a sniffer on the network and monitor the traffic that way. Two products that come to mind are NAI sniffer and Niksun's NetVCR.

Hope it helps.

Steve

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