Vrrp Overview - Huawei Quidway S5600 Series Operation Manual

Operation Manual – VRRP
Quidway S5600 Series Ethernet Switches-Release 1510
Chapter 1 VRRP Configuration

1.1 VRRP Overview

Virtual router redundancy protocol (VRRP) is a fault-tolerant protocol.
As shown in Figure 1-1, in general,
A default route (for example, the next hop address of the default route is
10.100.10.1, as shown in the following figure) is configured for every host on a
network.
The packets destined to the external network segments and sourced from these
hosts go through the default routes to the Layer 3 Switch, implementing
communication between these hosts and the external network.
If Switch fails, all the hosts on this segment taking Switch as the next-hop through
the default routes are cut off from the external network.
10.100.10.7
Hos t 1
Figure 1-1 LAN Networking
VRRP, designed for LANs with multicast and broadcast capabilities (such as Ethernet),
settles the problem caused by switch failures.
VRRP combines a group of LAN switches, including a master switch and several
backup switches, into a virtual router, or a backup group.
N etwork
Sw itc h
10.1 00 .10. 1
Ethernet
1 0.100. 10.8
H ost 2
Huawei Technologies Proprietary
1-1
Chapter 1 VRRP Configuration
10.100.10.9
Hos t 3