Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.0P1 - Page 1041

CAUTION: Increasing the advertisement interval increases the VRRP Master dead interval, resulting in an increased failover time for Master/Backup election. Take caution when increasing the advertisement interval, as the increased dead interval may cause packets 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, the packet to the destination is dropped on that VRRP node. Table 109. Recommended VRRP Advertise Intervals Total VRRP Groups Recommended Advertise Interval Less than 250 1 second Between 250 and 450 2-3 seconds Between 450 and 600 3-4 seconds Between 600 and 800 4 seconds Between 800 and 1000 5 seconds Between 1000 and 1200 7 seconds Between 1200 and 1500 8 seconds VRRP Configuration By default, VRRP is not configured. Groups/Interface 12 24 36 48 84 100 120 Configuration Task List The 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 Delay For a complete listing of all commands related to VRRP, refer to Dell Networking OS Command Line Reference Guide. Creating a Virtual Router To enable VRRP, create a virtual router. In Dell Networking Operating System (OS), the virtual router identifier (VRID) identifies a VRRP group. To enable or delete a virtual router, use the following commands. • Create a virtual router for that interface with a VRID. INTERFACE mode vrrp-group vrid Virtual Router Redundancy Protocol (VRRP) 1041