Packet Sniff 3Com 5232 Router For MPLS EXP Values I was able to figure out my previous problem associated with the Edge router. However, I wanted to know if anyone knows how to monitor packets as they leave an interface. For example, I want to see if the packets leaving the 3Com 5232 are being properly labeled and given the correct EXP value. I have implemented MPLS CBQ QoS and need to know if it is applying my credentials correctly. I tried using the command "display qos policy interface ethernet 1/0 outbound" which displays "matches", but I still need to see that the EXP values are correct. If anyone has any ideas it would be most welcomed. TIA!!! Take care!
I believe the packet sniffer Wireshark (www.wireshark.org - used to be called ethereal) can understand MPLS packets... so install that on a PC... and I suggest that you then attach the PC to a managed switch somewhere between the two routers and then use the port mirroring (or equivalent feature) of the switch to copy all the data going between the routers to your PC, from which you can sniff it and make sure it all looks correct.
Obviously if you don't have managed switches you could insert a hub in the data path somewhere and attach the PC to it, but I'm guessing your network probably does have managed switches... and anyway the hub would obviously reduce performance whilst it was there, which might not be acceptable...
PS if you install wireshark don't forget to install WinPCap at the same time... more details on their website.