29: Configuring VRRP
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© Virtual Access 2017
GW1000 Series User Manual
Issue: 1.9 Page 277 of 350
29 Configuring VRRP
29.1 Overview
Virtual Router Redundancy Protocol (VRRP) is a networking protocol designed to
eliminate the single point of failure inherent in the static default routed environment.
VRRP specifies an election protocol that dynamically assigns responsibility for a virtual
router to one of the VRRP routers on a LAN. The VRRP router controlling the IP
address(es) associated with a virtual router is called the Master, and forwards packets
sent to these IP addresses. The election process provides dynamic failover in the
forwarding responsibility from the Master to a backup router should the Master become
unavailable. This process allows the virtual router IP address(es) on the LAN to be used
as the default first hop router by end hosts. The advantage gained from using VRRP is a
higher availability default path without requiring configuration of dynamic routing or
router discovery protocols on every end host.
Two or more routers forming the redundancy cluster are configured with the same
Router ID and Virtual IP address. A VRRP router group operates within the scope of the
single LAN. Additionally, the VRRP routers are configured with its initial role (Master or
Backup) and the router priority, which is a factor in the master router election process. A
password authentication may also be configured to protect VRRP protocol messages
against spoofing.
The VRRP protocol is implemented according to Internet standard RFC2338.
29.2 Configuration package used
29.3 Configuring VRRP using the web interface
To configure VRRP through the web interface, in the top menu, select Network ->
VRRP. The VRRP page appears. To access configuration settings, click ADD.
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