Alcatel Unleashed

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

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.

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?