What is the probable cause of this logs in our Core switches, I haven't change the vrrp settings, it is always showed up every night.
*Feb 2 07:27:12: %VRRP-6-STATECHANGE: Vl1 Grp 1 state Backup -> Master
*Feb 2 07:27:13: %VRRP-6-STATECHANGE: Vl2 Grp 2 state Backup -> Master
*Feb 2 07:27:13: %VRRP-6-STATECHANGE: Vl3 Grp 3 state Backup -> Master
*Feb 2 07:27:13: %VRRP-6-STATECHANGE: Vl2 Grp 2 state Master -> Backup
*Feb 2 07:27:14: %VRRP-6-STATECHANGE: Vl3 Grp 3 state Master -> Backup
*Feb 2 07:27:14: %VRRP-6-STATECHANGE: Vl1 Grp 1 state Master -> Backup
Thanks in advance!
Fyi. These Vlans belongs to Server farm, high traffic are expected on these Vlans. What would be the solution for this problem? How can we avoid it? I believe it might cause future problem.
here are the VRRP brief info:
Vl1 1 150 3609 Y Master 10.243.10.253 10.243.10.254
Vl2 2 150 3414 Y Master 10.243.20.253 10.243.20.254
Vl3 3 150 3609 Y Master 10.243.30.253 10.243.30.254
Thanks in advance!
Try to do the following things to troubleshoot this type of problem :-
1) Try a shut / no shut on the VLAN on both switches.
2) Check the interface counters for the physical interface over which the VRRP hellos are received. Is there a physical interface issue which is inhibiting reliable communication between the two switches?
3) Check the CPU utilization, in particular the utilization for the processor labeled RP2 in the show processes cpu output. RP2 processes VRRP hellos and several additional traffic types, including ARP requests. A large number of ARP requests can disrupt the ability of RP2 to receive VRRP hellos.
4) Use the "Gratuitous ARP sent" counter in the output of the show vrrp command to determine the number of times that a standby router has become the VRRP master. With each status change from standby to master, the router sends a gratuitous ARP.
and if possible if both the switches are directly connected i would suggest you to configure etherchannel trunk 4 to 8 port between them as heavy amount of traffic is flowing between the switches.
Hope to help