HSRP Multiple Tracking interfaces

Unanswered Question
Oct 8th, 2008

Hello.

Does the 3750-e Platform able to track multiple interfaces using HSRP?

Something like:

interface Vlan15

ip address 172.22.15.3 255.255.255.0

standby 10 ip 172.22.15.1

standby 10 authentication 7campus

standby 10 track Gig4/0/1

standby 10 track Port-channel1

standby 10 track Gig3/0/1

end

If that is possible, all tracking interfaces must be down in order to switch to the stand-by router?

I have this problem too.
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Giuseppe Larosa Wed, 10/08/2008 - 12:20

Hello Dywer,

this is a legitimate configuration

with default parameters every tracked interface down reduces the priority of 10

to switch to the other router

the other router must have preemption enabled and also this to be able to regain role when link is restored

on both routers:

int vlan15

standby 10 preempt

it is your choice how many links have to be down before switchover

if standby has priority 95 just one is enough if it has 85 two links must be down

first case:

100 -10 = 90 < 95 -> switchover

100 -10 = 90 > 85 -> no switchover

a second tracked link is down

100 -10 -10 = 80 < 85 -> switchover

Hope to help

Giuseppe

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