#43 Use interface name instead of descr for querying interface names.

[Afan Ottenheimer]

Ubuntu 16.04 is now putting long descriptions for network interfaces with

So the command
snmpwalk .... iso.3.6.1.2.1.2.2.1.2

Returns:

iso.3.6.1.2.1.2.2.1.2.1 = STRING: "lo"
iso.3.6.1.2.1.2.2.1.2.2 = STRING: "Red Hat, Inc Device 0001"

Reading the docs - it is now apparently recommended to use name instead of description for network interfaces

snmpwalk ..... iso.3.6.1.2.1.31.1.1.1.1

Returns

iso.3.6.1.2.1.31.1.1.1.1.1 = STRING: "lo"
iso.3.6.1.2.1.31.1.1.1.1.2 = STRING: "eth0"

I changed line 33 of check_snmp_int.pl to

my $descr_table = '1.3.6.1.2.1.31.1.1.1.1';

and that worked well.