I am trying to figure out the best way to configure alerts for 7609 router such that when interface pos9/0/0.1 is down I will be notified.
the router is currently configured "snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart". but when the sub interface went down, no alert was sent. in this case I think because of couple reasons.
1. the physical interface remain "up" but protocol "down".
2. the interface command "snmp trap link-status" is not configured on either the physical or sub interface. this command is not applicable to sub interface. even if it were configured on the physical interface, because the link didn't go down (only protocol down) there wouldn't be traps.
How should configure the router? Do I have to rely on other notification options such as maybe bgp neighbor loss? Please advise.
POS9/0/0 unassigned YES manual up down
POS9/0/0.1 22.214.171.124 YES manual down down