Vrrp Benefits; Vrrp Implementation - Dell Force10 Z9000 Configuration Manual

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Figure 117. 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.

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.

Z-Series supports a total of 255 VRRP groups on a 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)