Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 1019
VRRP Benefits, VRRP Implementation
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For more detailed information about VRRP, refer to RFC 2338, Virtual Router Redundancy Protocol. Figure 148. Basic VRRP Configuration VRRP Benefits With VRRP configured on a network, end-station connectivity to the network is not subject to a single point-of-failure. Endstation connections to the network are redundant and are not dependent on internal gateway protocol (IGP) protocols to converge or update routing tables. VRRP Implementation Within a single VRRP group, up to 12 virtual IP addresses are supported. Virtual IP addresses can belong to the primary or secondary IP address' subnet configured on the interface. You can ping all the virtual IP addresses configured on the Master VRRP router from anywhere in the local subnet. 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. Virtual Router Redundancy Protocol (VRRP) 1019
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