CAUTION: Increasing the advertisement interval increases the VRRP Master dead interval, resulting in an increased failover timefor Master/Backup election. Take caution when increasing the advertisement interval, as the increased dead interval may causepackets to be dropped during that switch-over time.NOTE: In a VLT environment, VRRP configuration acts as active-active and if route is not present in any of the VRRP nodes, thepacket to the destination is dropped on that VRRP node.Table 112. Recommended VRRP Advertise IntervalsTotal VRRP Groups Recommended Advertise Interval Groups/InterfaceLess than 250 1 second 12Between 250 and 450 2–3 seconds 24Between 450 and 600 3–4 seconds 36Between 600 and 800 4 seconds 48Between 800 and 1000 5 seconds 84Between 1000 and 1200 7 seconds 100Between 1200 and 1500 8 seconds 120VRRP ConfigurationBy default, VRRP is not configured.Configuration Task ListThe following list specifies the configuration tasks for VRRP.• Creating a Virtual Router (mandatory)• Configuring the VRRP Version for an IPv4 Group (optional)• Assign Virtual IP Addresses mandatory)• Setting VRRP Group (Virtual Router) Priority (optional)• Configuring VRRP Authentication (optional)• Disabling Preempt (optional)• Changing the Advertisement Interval (optional)• Track an Interface or Object• Setting VRRP Initialization DelayFor a complete listing of all commands related to VRRP, refer to Dell Networking OS Command Line Reference Guide.Creating a Virtual RouterTo enable VRRP, create a virtual router. In Dell Networking Operating System (OS), the virtual router identifier (VRID) identifies a VRRPgroup.To enable or delete a virtual router, use the following commands.• Create a virtual router for that interface with a VRID.INTERFACE modevrrp-group vrid1026 Virtual Router Redundancy Protocol (VRRP)
