need to lookup master interface that inherit IP address to unnumbered interface via SNMP


I need to get information via SNMP about the master interface from which the other interface inherits its IP address.

So if I configure this on a Cisco router

interface loopback0 ip address interface Serial0 ip unnumbered loopback0

I need to get the ifindex or name of the master interface for Serial0 like in this show command:

P2>sh int s0 Serial0 is up, line protocol is up Interface is unnumbered. Using address of Loopback0 (

I already searched several public and cisco MIBs and also did a grep over all RFCs for the word unnumbered near SNMP without any luck yet ...

With kind regards, Marcus Kommnick at systeme dot de

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