find SNMP ifIndex value if hostname and SNMP ifDescr are known

Hi,

Is there a clever method to find out the SNMP ifIndex value if I know
the hostname of the network device and ifDescr for this particular
interface? At the moment I do it like this:

snmpwalk -v 2c -c public router ifDescr | grep -E
"GigabitEthernet5/26$" | gsed -r "s/IF-MIB::ifDescr.([0-9]+) .*/\1/"

"router" is the hostname and "GigabitEthernet5/26" is the ifDescr.
"gsed -r "s/IF-MIB::ifDescr.([0-9]+) .*/\1/"" part is to make sure
that I get the ifIndex of the physical interface and not the
sub-interface like "GigabitEthernet5/26.123".


thanks,
Martin

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