packetlab's video: Cisco IOS Embedded Packet Capture EPC Lab - Part 2

Cisco IOS Embedded Packet Capture (EPC) Lab - Part 2 of 3 With the addition of the Embedded Packet Capture (EPC) feature, Cisco IOS gives you ability to capture data packets flowing through, to, and from, a Cisco router. You'll need to be running IOS version 12.4(20)T or later and you'll need a beefy router with plenty of DRAM and CPU like the ISR series. You do have the ability to view captured data on the router in ASCII format with some limited filters, but in most cases you'll want to transfer the captured data to another device to do the packet analysis (FTP, HTTP, HTTPS, PRAM, RCP, SCP, and TFTP are all supported transfer methods). While EPC does not take the place of a dedicated sniffer, NAM, or even a laptop with packet analysis software installed; it does give you a nice packet capture option in situations when you don't have another method to capture packets.