Here we will be utilising the trafiic export feature which has been in use from IOS 12.3(4)T The IP Traffic Export feature allows users to  configure their router to export IP packets that are received on  multiple, simultaneous WAN or LAN interfaces...

Add to the config or make sure you have it already:service timestamps debug datetime msecservice timestamps log datetime msecservice sequence-numbers!logging buffered 5000000     -> 5Mb buffer log (Check to see if there is enough space)logging rate-l...