Cisco Troubleshooting Commands for Input/Output Drops

Some common commands that can help troubleshoot packet discards or drops:

#show interface ___

#show interface ___ stats

#show interface ___ switching

#show cef not-cef-switched

#show ip cef switching statistics

#show ip cef switching statistics features

#show ip traffic

#show buffers

and if you suspect an issue with CEF, you can use:

#debug ip cef receive

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