Tip: Cisco router persistent SNMP interface name (ifname)

When monitoring your Cisco device interfaces via SNMP keep in mind that interface index will changes after reboot and that will affect all your charts and stats.

Here is how you can avoid this disaster:

Connect to the router and type floowing commands


enable
conf t
snmp-server ifindex persist
end
wr mem
Recource on "ifindex"
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configuration/guide/ifindx.html