decreases based on the dynamics of the network, the advertisement intervals may increase or decreaseaccordingly.CAUTION: Increasing the advertisement interval increases the VRRP Master dead interval,resulting in an increased failover time for Master/Backup election. Take caution when increasingthe advertisement interval, as the increased dead interval may cause packets to be droppedduring that switch-over time.Table 61. Recommended VRRP Advertise Intervals on the Z9000Recommended AdvertiseInterval Groups/InterfaceTotal VRRP GroupsLess 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 LineReference Guide.Creating a Virtual RouterTo enable VRRP, create a virtual router. In Dell Networking Operating System (OS), the virtual routeridentifier (VRID) identifies a VRRP group.To enable or delete a virtual router, use the following commands.Virtual Router Redundancy Protocol (VRRP) 909
