Have a look at this doc:
Thanks.I have tried this but these command are dedicated for "F" series cards and these are not working for "M" series cards.
It will be great if you can help me with M series T-shoot document.
You maybe able to use some of these commands. See page 99-103 regarding "M" series packet counters.
Thanks .That was a nice document .
I have tried to identify egress buffer congestion backing up ingress port.(show hardware queuing drops egress )
But no luck ,as per the interface the discards are continuously increasing.i suspect the card is experiencing over subscription.