HSRP Multiple Tracking interfaces

Unanswered Question
Oct 8th, 2008
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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?

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Giuseppe Larosa Wed, 10/08/2008 - 12:20
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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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