Users Guide

Figure 147. Basic VRRP Conguration
VRRP Benets
With VRRP congured 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.
VRRP Implementation
The S5000 supports a total of 255 VRRP groups on a switch.
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 congured on the interface. You can ping all the virtual IP addresses congured on the Master VRRP router from
anywhere in the local subnet.
The recommendations in the following table may vary depending on various factors like ARP broadcasts, IP broadcasts, or 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.
Default VRRP settings may aect the maximum number of groups that you can congure and work eciently as a result of
hardware throttling VRRP advertisement packets reaching the RP2 processor on the S5000. To avoid throttling VRRP
advertisement packets, Dell Networking recommends increasing the VRRP advertisement interval to a value higher than the default
value of 1 second. The recommendations are as follows:
Virtual Router Redundancy Protocol (VRRP)
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