You can use SPAN on the switch port that the FE port is connected to and use a software sniffer to capture the traffic on that interface. You can follow this guide for pretty well any Cisco IOS switch:
Once you designate a destination port for your span source (your 7204 fe port for ex.) you can connect a PC/laptop to that destination port and run ethereal, or whatever sniffer software you like and see a full dump of all traffic.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...