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HSRP tracking using RTR

s-durando
Level 1
Level 1

With the following configuration the HSRP state changing is triggered using a track object related to RTR.

The RTR probe is the ICMP ping, with the destination interface on the point-to-point WAN link.

!

interface FastEthernet0/0

stand 100 track 123 decrement 10

!

(...)

!

track 123 rtr 1 reachability

!

rtr 1

type echo protocol ipIcmpEcho 172.16.23.7

timeout 1000

frequency 3

threshold 2

rtr schedule 1 life forever start-time now

Is it possible to configure RTR in a way that HSRP state changes only after a CONFIGURABLE number of failed ICMP pings

and not if a single ICMP ping fails?

3 Replies 3

j.samanta
Level 1
Level 1

Under this track 123 rtr 1 reachability you can specify down delay and up delay ie how much time will it take after a down to actually implement the track option. You cnan give 30 sec which means it will wait for 10 ICMP Failed operations to perform

Ok, so with delay configuration I can postpone the changing status decision on my track object.

I still have one doubt: what happens if in the meantime the link is going up and down and, for example, 5 ICMP didn't failed and 5 failed?

Is my changing status decision conditioned only by the 10th ICMP?

Say the first ping failed and the 2nd succeded, then the next time the ping fails the counter for failures will begin from 1 again. It will ie wait for 10 continuous ping timeouts

HTH