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Using "debug ip packet detail" to follow ICMP traffic across multiple hops

Jim R

Hi all,

I'm doing a bit of an experiment at the moment tracking an ICMP reply and the route it takes through our lab network however I've come to a bit of a dead end.  If I do a "debug packet ip detail" on our destination router (Where we are trying to ping to) and the router I am using to send the packet I can clearly see three four things:

1) Sending router: The ICMP type 8 message from the sending router

2) Sending router: The packet going out via the next hop router

3) Recieving router: The ICMP type 0 message going out from the recieving router

4) Recieving router: The packet going out via the next hop router.

However what I was expecting to see was some sort of IP traffic on the routers in the middle stating that they were passing on the traffic but alas I don't see anything.

So my question is:

1) Using "debug ip packet detail" should I be able to see ICMP send/replies/associated packets traversing the network including the routers in the middle.

2) If not what command should I be using.

Cisco details ping usage etc on it's site but only shows pinging a host which is the next hop router.  The other examples just show using "debug ip packet detail" to get back information on the packet being dropped as there is no route to the host.

Perhaps someone could fill in the blanks for me?

Many thanks,


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