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QLD
Occasional Contributor II
Posts: 14
Registered: ‎07-21-2011

VRRP tracking

Hello all!

 

In the VRRP interface tracking config all I can find is to subtrack x from the priority, but not add.

 

When my NAT public link goes down I want the inside privet vlans VRRP to flip to the other controller, can this be done?

 

Here is my config..

 

1/3 is my public routed interface..

 

controler  1

 

vrrp 11


 priority 110

  authentication admin
  ip address 172.16.255.1
  vlan 1311
  tracking interface gigabitethernet 1/3 sub 20
  no shutdown

 

controller 2

 priority 100

  authentication admin
  ip address 172.16.255.1
  vlan 1311
  tracking interface gigabitethernet 1/3 sub 20
  no shutdown

 

Thanks

Q.

 

Retired Employee
Posts: 234
Registered: ‎04-19-2011

Re: VRRP tracking

 

Controller 1 - VRRP master - priority 110 

Controller 2 - VRRP standby - priority 100 

 

If the link on interface gig1/3 goes down on controller 1, then the tracked priority will be (110-20) = 90

 

90 < 100 (VRRP priority of Controller 2)

 

Controller 2 will receive VRRP advertisement with lower priority from Controller 1 and hence will assume the VRRP master role and start serving the virtual IP 172.16.255.1

 

 

 

 

 

 

--
HT
Aruba Employee
Posts: 509
Registered: ‎07-03-2008

Re: VRRP tracking

Be careful, you  must use the "preempt" command in your VRRP configuration.  A backup VRRP device does not assume a master role unless preempt is enabled.

Retired Employee
Posts: 234
Registered: ‎04-19-2011

Re: VRRP tracking

Yes. You will have to configure preemption on the backup controller. 

 

--
HT
Aruba Employee
Posts: 509
Registered: ‎07-03-2008

Re: VRRP tracking

You need to configure "preempt" on both controllers so the backup will take over when the master fails and the master will resume as master when it's back up.

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