Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 1219

Up to 255 VRRP groups are supported on the switch. The total number of VRRP groups per system should be less than 512. The following recommendations shown may vary depending on various factors like address resolution protocol (ARP) broadcasts, IP broadcasts, or spanning tree protocol (STP) before changing the advertisement interval. When the number of packets processed by RP2/CP/FP processor increases or decreases based on the dynamics of the network, the advertisement intervals may increase or decrease accordingly. 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. Table 96. Recommended VRRP Advertise Intervals on the Switch Recommended Advertise Interval Total VRRP Groups 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 Groups/Interface 12 24 36 48 84 100 120 VRRP Configuration By default, VRRP is not configured. 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) • Setting VRRP Initialization Delay • Track an Interface or Object Virtual Router Redundancy Protocol (VRRP) 1219