cause of vrrp toggled log message

[hjin]

hello.
First of all, thanks a lot for your help.

We are using two 9700 backbones.
No log occurred in the active backbone, but a vrrp toggled log occurred in the standby backbone, and a service failure occurred momentarily.


Please tell me what is causing the vrrp toggled log and what I need to check.

THU APR 21 06:51:30 2022 VRRP info VRRP toggled once in the last minute. VRID=3
THU APR 21 06:51:30 2022 VRRP info VRRP toggled 2 times in the last minute. VRID=4
THU APR 21 06:51:30 2022 VRRP info VRRP toggled 2 times in the last minute. VRID=12
THU APR 21 06:51:30 2022 VRRP info VRRP toggled once in the last minute. VRID=5
THU APR 21 06:51:31 2022 VRRP info VRRP toggled once in the last minute. VRID=2
THU APR 21 06:51:38 2022 VRRP info VRRP toggled once in the last 2 minutes. VRID=6
THU APR 21 06:51:54 2022 VRRP info VRRP toggled once in the last 2 minutes. VRID=7
THU APR 21 06:52:03 2022 VRRP info VRRP toggled once in the last 2 minutes. VRID=8
THU APR 21 06:52:13 2022 VRRP info VRRP toggled once in the last 2 minutes. VRID=9
THU APR 21 06:52:13 2022 VRRP info VRRP toggled once in the last 2 minutes. VRID=10
THU APR 21 06:52:22 2022 VRRP info VRRP toggled once in the last 2 minutes. VRID=11
THU APR 21 06:52:34 2022 VRRP info VRRP toggled 2 times in the last minute. VRID=5
THU APR 21 06:52:41 2022 VRRP info VRRP toggled 2 times in the last minute. VRID=6
THU APR 21 06:52:57 2022 VRRP info VRRP toggled 2 times in the last minute. VRID=7
THU APR 21 06:53:07 2022 VRRP info VRRP toggled once in the last minute. VRID=8
THU APR 21 06:53:16 2022 VRRP info VRRP toggled once in the last minute. VRID=9
THU APR 21 06:53:16 2022 VRRP info VRRP toggled 2 times in the last minute. VRID=10
THU APR 21 06:53:26 2022 VRRP info VRRP toggled once in the last minute. VRID=11

[silvio]

maybe the connection between both vrrp switches where interrupted. Than the backup changed to master. Master keeps its role.
Check with
show vrrp
show vrrp statistics
check the link etc.

[hjin]

Currently, the service is operating normally.
VRRP status is also normal.

I want to know why there is no log in active and the service is disconnected within 1 minute.
Can you figure out the probable cause?