Find The Ifindex On A Cisco Router

If you need to find the SNMP Ifindex of your Cisco router you can simply enter :

!change the interface name for your desired entry.
router# show snmp mib ifmib ifindex TenGigabitEthernet1/1
Interface = TenGigabitEthernet1/1, Ifindex = 1

For an IOS-XR router it is:

show snmp int Te0/0/0/0.1651 ifindex