vRouter Redundancy Protocol (VRRP) Overview

This section details commands for configuring the Virtual Router Redundancy Protocol (VRRP) on a Sun Secure Application Switch. VRRP provides default gateway redundancy between Sun Secure Application Switch should a link failure occur. See RFC 2338, Virtual Router Redundancy Protocol, for details about this protocol.

For additional information about configuring VRRP on a Sun Secure Application Switch and how it works with the Virtual Service Redundancy Protocol (VSRP), see the Sun Secure Application Switch - Configuration and Implementation Guide for v3.0.

VRRP

A VRRP configuration consists of A Sun Secure Application Switch shared and default vRouters that function as VRRP routers. When you configure VRRP on a vRouter interface, you create a VRRP router that operates as either a master or backup router in a redundant Sun Secure Application Switch configuration.

VRRP uses an election protocol that dynamically assigns master or backup responsibility for each IP interface running VRRP. The router responsible for forwarding traffic on that interface is the master VRRP router. The other VRRP routers in the configuration function as VRRP backup routers. If the master VRRP router becomes unavailable, the election process enables a different VRRP router to become the master, thus providing dynamic failover for IP traffic forwarding. VRRP elections are run individually on each IP interface. A VRRP router may be master for some interfaces, and backup for others.