3com 3031 Instruccion De Instalación
75
VRRP C
ONFIGURATION
This chapter tells you the following:
■
Introduction to VRRP
■
How To Configure VRRP
■
Typical Examples of VRRP
■
Troubleshooting VRRP
Introduction
VRRP (Virtual Router Redundancy Protocol) is a fault-tolerant protocol. As shown
in Figure 255, a default route will be configured for a network host. Packets sent
by the host with destination addresses not in the local network segment will go
through the default route to Router A to implement communication between the
host and the external network. When Router A breaks down, all the hosts
regarding Router A as the default route next-hop will stop the communication
with the external network.
in Figure 255, a default route will be configured for a network host. Packets sent
by the host with destination addresses not in the local network segment will go
through the default route to Router A to implement communication between the
host and the external network. When Router A breaks down, all the hosts
regarding Router A as the default route next-hop will stop the communication
with the external network.
Figure 255 LAN networking scheme
To solve the above problem, VRRP is designed for LANs with multicasting and
broadcasting capabilities (such as Ethernet), Figure 256 explains the
implementation principle of VRRP. VRRP combines a group of LAN routers
(including a MASTER router and several STANDBY routers) into a virtual router,
called a standby group.
broadcasting capabilities (such as Ethernet), Figure 256 explains the
implementation principle of VRRP. VRRP combines a group of LAN routers
(including a MASTER router and several STANDBY routers) into a virtual router,
called a standby group.
Ethernet
10.100.10.1
Network
Host 1
Host 3
Host 2
LAN 1
10.100.10.1
10.100.10.1
10.100.10.1
RouterA