This article provides a troubleshooting step for one of VRRP scenarios where both VRRP nodes are observed in the Master state.

During investigation, the following symptoms may be observed:

• The Backup node incorrectly transitions to and remains in the Master state.
• The output of "show vrrp extensive" shows the Advertisement Received counter as 0.
• monitor traffic interface <interface-name> confirm that VRRP advertisement packets are arriving on the interface.
• Despite receiving the packets on the interface, the VRRP process does not increment the Advertisement Received counter.

• Verify whether a firewall filter is configured on:

1. The VRRP-enabled interface.
2. On loopback interface.

• Review the firewall filter configuration and ensure that VRRP traffic is explicitly permitted.
• Confirm that the permit statement for VRRP traffic is evaluated before any reject or discard terms.
• Commit the corrected firewall filter configuration.
• Verify that:

1. The Advertisement Received counter begins incrementing in the show vrrp extensive output.
2. VRRP states stabilize according to the configured priorities.
3. One node becomes Master and the other becomes Backup.