When the FW's service interface works at Layer 3 and connects to a router and OSPF runs between the FW and router, you can configure the VGMP group to monitor the OSPF neighbor status to quickly detect OSPF route faults on the network and trigger an active/standby switchover.
When the FW's service interface works at Layer 3 and connects to a router and BGP runs between the FW and router, you can configure the VGMP group to monitor the BGP peer status to quickly detect BGP route faults on the network and trigger an active/standby switchover.