When two routers running HSRP that track tunnel interface, configuration as below:
IBSSCC1#sh run int vlan1
Current configuration : 250 bytes
description Connection to Customer LAN
ip address 10.122.222.6 255.255.0.0
ip nat inside
ip ospf cost 10
standby 1 ip 10.122.222.2
standby 1 priority 110
standby 1 preempt
standby 1 track Tunnel0
There is OSPF configured between both two spoke routers to hub router.
Today during the outage that, OSPF keep flapping on active HSRP router, however, there is no link flapping can be seen, tunnel interface shows up, but the latency is huge when reach to hub router which cause OSPF unstable, since HSRP is track to tunnel0, so it wont trigger HSRP function take place, may i see some advice how to deal with this situation? is that advisable that add keepalive under the tunnel interface?