HSRP track interface (ASR9k v4.2.3)

[Jaime Soto Valenzuela]

Hi all,

I was trying to configure the track interface command within hsrp, and when I apply the command the priority group decrement immediately.

Before of apply the configuration:

RP/0/RSP0/CPU0:PE1-ASR9010-LAB-MACUL#sh hsrp bvi 600

Thu Sep 12 14:04:07.548 UTC

                       P indicates configured to preempt.

                       |

Interface      Grp Pri P State   Active addr     Standby addr   Group addr   

BV600            1 110 P Active  local           200.10.10.3    200.10.10.1

Then, I apply track interface:

router hsrp

interface BVI600

  address-family ipv4

   hsrp 1 version 1

    timers 1 3

    preempt

    priority 110

    address 200.10.10.1

    track GigabitEthernet0/3/0/26 20

   !

And priority decrement:

RP/0/RSP0/CPU0:PE1-ASR9010-LAB-MACUL#sh hsrp bvi 600

Thu Sep 12 14:05:20.302 UTC

                       P indicates configured to preempt.

                       |

Interface      Grp Pri P State   Active addr     Standby addr   Group addr   

BV600            1  90 P Standby 200.10.10.3     local          200.10.10.1 

Why priority decrement if the interface is always up?

Regards.

[Michael Toth]

Is the interface 'GigabitEthernet0/3/0/26' down ?

[Jaime Soto Valenzuela]

No. That´s why I am asking why the priority decrement if the interface is always UP.

Look:

RP/0/RSP0/CPU0:PE1-ASR9010-LAB-MACUL#sh inter gi 0/3/0/26

Fri Sep 13 10:41:55.907 UTC

GigabitEthernet0/3/0/26 is up, line protocol is up

Without track command:

RP/0/RSP0/CPU0:PE1-ASR9010-LAB-MACUL#sh hsrp bvi 600

Fri Sep 13 10:42:30.411 UTC

                       P indicates configured to preempt.

                       |

Interface      Grp Pri P State   Active addr     Standby addr   Group addr    

BV600            1 110 P Active  local           200.10.10.3    200.10.10.1   

After I apply track command:

router hsrp

interface BVI600

  address-family ipv4

   hsrp 1 version 1

    timers 1 3

    preempt

    priority 110

    address 200.10.10.1

    track GigabitEthernet0/3/0/26 20

RP/0/RSP0/CPU0:PE1-ASR9010-LAB-MACUL#sh inter gi 0/3/0/26

Fri Sep 13 10:44:28.498 UTC

GigabitEthernet0/3/0/26 is up, line protocol is up

RP/0/RSP0/CPU0:PE1-ASR9010-LAB-MACUL#sh hsrp bvi 600                

Fri Sep 13 10:44:43.139 UTC

                       P indicates configured to preempt.

                       |

Interface      Grp Pri P State   Active addr     Standby addr   Group addr    

BV600            1  90 P Standby 200.10.10.3     local          200.10.10.1   

[Marks Maslovs]

Hi,

https://supportforums.cisco.com/thread/2183726

Had the same issue.

[Bryan Garland · Accepted solution]

What is the configuration on GIg0/3/0/26?  Is it definded as l3 or l2 interface?  HSRP can't track an L2 interface.

Thanks,

Bryan

[xthuijs]

An option may be to create an object and track the state of that object?

track THISOBJECT
type line-protocol state
 interface GigE0/0/0/10

router hsrp
int bvi 52
address-family ipv4
track object THISOBJECT 20

didnt test it, but it might be a usable workaround available in 4.2.1 onwards.

xander

[Jaime Soto Valenzuela]

Hi Alexander,

I tried with track object and it works fine.

Thanks!.

Regards.

[Jaime Soto Valenzuela]

Hi Bryan,

The inteface is L2, that is the problem. Thanks!