NETGEAR GSM7248R Supplement Manual

VRRP – Definition:
VRRP, which stands for Virtual Router Redundancy Protocol, specifies an election system
between different Layer 3 devices to represent a default gateway for the devices that will connect
to them.
As an example, if three different Layer 3 devices are configured to use VRRP, all the hosts could
have the same default gateway IP (In this document we'll refer to it as VRRP IP). Any of these
three Layer 3 devices would be able to forward and respond to packets that come to this VRRP
IP. However, at any given time, only one will be the master and the other two will be standing by
as backup. Should the master unit fail, an election will occur to decide which of the two Switches
will become master and forward packets destined to the VRRP IP.
VRRP – GSM/FSM 7300 series:
Although there are many different scenarios where VRRP may be used to create redundancy in
your network, this document will guide you on how to set up VRRP between two Layer 3
switches, so they may dynamically adapt to a loss of connectivity to one of the switches and
seamlessly redirect host traffic towards another a backup router.
At the end of this document we will briefly describe some of the alternative deployment scenarios.