Troubleshooting packet flow on Cisco 6500 based on SUP720 by using ELAM

1. Enable service internal (this is a hidden command so it is not available in the parser)

   Switch(config)#service internal

2. Specify the asic to capture on:

   Switch#show platform capture elam asic superman slot 5  

3. Specify the trigger for the flow we want to capture:

   Switch#show platform  capture elam trigger dbus ipv4 if ip_sa=x.x.x.x ip_da=x.x.x.x    <<<<<<<<<<< use other trigger for ARP request/ARP reply. ELAM will not triggered if ARP is incomplete.

4. Start the capture

   Switch#show platform capture elam start


5. View the status, we are looking for "elam capture completed"

   Switch#show platform capture elam stat

6. After the packet has been caught, view the data

   Switch#show platform  capture elam data


  Decode the  ELAM RESULT

1) If Flood bit is set,  plus 8 in the destination index to see the ports.



   Switch#Remote login switch
   Switch-sp#test mcast ltl index info <>


2) We can do elam on egress as well. Just try with IP  only . No source/destination MAC in trigger.

3)  use OTHER for ARP ELAM.