There is a long list of debug commands. Are there any debug (or other IOS) commands which can capture detailed packet or frame (layer 2, 3) data across an interface? I know we have show-mac-address-table and show arp, but this doesn't show things like what was the destination MAC of the frame, the destination IPv4 of the packet, or what type of protocol (e.g. ICMP, ARP) used. Does IOS 12.3+ offer a way to do this?
All I have found as far as debug is
http://www.cisco.com/en/US/docs/ios/12_4t/ip_addr/configuration/guide/htarpmon.html#wp1203532
Best Answer
You may look at Embedded Packet Capture feature - 12.4(20)T or later.