HSRP duplicate address error on 6509

[nawas]

I have 6509 in SRM (single router mode) and I have been getting lot of these errors %STANDBY-3-DUPADDR: Duplicate address 10.4.31.253 on Vlan431, sourced by 0000.0c07.ac02. And when I check show standby i get the following:

Active rotuer:

Vlan431 - Group 2

Local state is Active, priority 110

Hellotime 3 holdtime 10

Next hello sent in 00:00:01.890

Virtual IP address is 10.4.31.254 configured

Active router is local

Standby router is 10.4.31.253 expired

Standby virtual mac address is 0000.0c07.ac02

2 state changes, last state change 5w2d

Standby Router:

Vlan431 - Group 2

Local state is Init (interface down), priority 110

Hellotime 3 holdtime 10

Virtual IP address is 10.4.31.254 configured

Active router is unknown expired

Standby router is unknown expired

0 state changes, last state change n

Why my standby router does not recognize the active router? Could there be any issue with the configuration?

And here is the Vlan431 config

nterface Vlan431

ip address 10.4.31.253 255.255.255.0

ip helper-address 10.0.235.1

no ip redirects

no ip route-cache

no ip mroute-cache

ipx encapsulation SAP

ipx network C4310001

standby 2 priority 110

standby 2 ip 10.4.31.25

Please advice.

[vinodmorsa]

Hi,

1) I did not see the preempt( maybe not configured). Give the preempt

2) The priority is the same on both the routers( i.e 110) give a lower value to the secondary router.

This should work.

Thanks,

Vinod

[nawas]

Reason that it has the same priorty is because it is in SRM (single router mode) which means standby router automatically synchronize the configuration with the active router as soon as you turn on the SRM and both active and standby routers have to have the same configuration. I have tried with the preempt but that didn't help.

Any other suggestions?

[glen.grant]

Also what you are showing here shows that one of your interfaces is down . you need to figure out why this interface is down.

Standby Router:

Vlan431 - Group 2

Local state is Init (interface down), priority 110

Hellotime 3 holdtime 10

Virtual IP address is 10.4.31.254 configured

Active router is unknown expired

Standby router is unknown expired

0 state changes, last state change n