Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.1P1 - Page 1043
VRRP Benefits, VRRP Implementation
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Figure 152. 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. End-station connections to the network are redundant and are not dependent on internal gateway protocol (IGP) protocols to converge or update routing tables. In conjunction with Virtual Link Trunking (VLT), you can configure optimized forwarding with virtual router redundancy protocol (VRRP). 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. 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. The S-Series supports varying number of maximum VRRP groups per interface. The supports a total of 2000 VRRP groups on a switch and 512 VRRP groups per interface. 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. Virtual Router Redundancy Protocol (VRRP) 1043
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