VRRP preempt

[Nitish_Gupta]

We are having two extreme switches which are having a vrrp running,

I have a pair of firewall which is connected to these switches, and they are running in the master-back up scenario, these firewalls are tracking IP of the VRRP on the extreme switches.

I had rebooted one of the switch, and when it was rebooted Sw2 takes over the VRRP mastership, which is fine and Firewall2 becames master.

When Sw1 came back up vrrp switches back to the Sw1 from Sw2. I am using DONT Preempt keyword. Still that switchover on vrrp happens, because of which my Firewall1 again becames master.

Since i am using DONT PREEMPT keywork in the vrrp configuration Sw1 should not became master, below is config for vlan and vrrp.

Sw1 #

# Module vrrp configuration.
#
create vrrp vlan INT vrid 1
configure vrrp vlan INT vrid 1 priority 110
configure vrrp vlan INT vrid 1 version v2
configure vrrp vlan INT vrid 1 dont-preempt
configure vrrp vlan INT vrid 1 add 10.2.1.1
enable vrrp vlan INT vrid 1
Sw1 #

SW2 #

# Module vrrp configuration.
#
create vrrp vlan INT vrid 1
configure vrrp vlan INT vrid 1 version v2
configure vrrp vlan INT vrid 1 dont-preempt
configure vrrp vlan INT vrid 1 add 10.2.1.1
enable vrrp vlan INT vrid 1
SW2 #

Using extreme Switch version ExtremeXOS version 15.6.4.2

[Nitish_Gupta]

Hello Henrique, Thanks alot for update.

Will definately work on opening a case.

[Henrique]

Hello Nitish, I would recommend you to open a GTAC case for further investigation.

I don't see any configuration issue. Also I have created a quick lab using EXOS 15.6.4.2 (no patch) and didn't see any issue (I was not using BD8k, I tried with Summit family).

[Nitish_Gupta]

We rebooted Sw1 twice and on both the occassions we have seen vrrp became master on switch2 and came back to Sw1 once its recovered.

Logs

Sw2

09/27/2016 22:51:50.73 MSM-A: VLAN INT vrid 1: transitioning to BACKUP(1)
09/27/2016 22:48:08.26 MSM-A: VLAN INT vrid 1: transitioning to MASTER(2)
09/27/2016 22:25:55.47 MSM-A: VLAN INT vrid 1: transitioning to BACKUP(1)
09/27/2016 22:22:03.03 MSM-A: VLAN INT vrid 1: transitioning to MASTER(2)

Sw1

09/27/2016 22:51:50.45 MSM-A: VLAN INT vrid 1: transitioning to MASTER(2)
09/27/2016 22:51:46.86 MSM-A: VLAN INT vrid 1: transitioning to BACKUP(1)

Thanks

[Henrique]

Hi Nitish, thanks for the outputs.

I don't see any issue with the configuration provided.

I have 2 more questions:

1 - How many times did you have the VRRP Master and Backup failover?
2 - If the VRRP failover has occurred more than once, did you see this issue on every occurrence?

Let's see if someone can share any thoughts, otherwise a lab with the EXOS version 15.6.4.2 might help.