as mentioned by the other poster, the best and more complete solution is netflow. Although netflow support is included in IOS and is easy to configure, unfortunately netflow collectors and analyzers are mostly commercial.
There is also some open source netflow products though, but they tend to be more complicated to use & configure. You can try for example ntop, but just google around a little bit and you'll find some more.
On the other, for a quick snapshot of protocol use in your router, if you have NBAR protocol discovery activated in your interfaces, just issue the following command:
# sh ip nbar protocol-discovery int YOUR_INTEFACE_GOES_HERE
That should show a traffic summary by protocol (last 5min I think) for protocols recognized by NBAR.
Jut remember, NBAR has to be activated on the corresponding interface prior to issuing the command above!
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...