Introduction To Vrrp Group - H3C S5600 Series Operation Manual

Operation Manual – VRRP
H3C S5600 Series Ethernet Switches
10.100.10.7/24
Host 1
Figure 1-1 LAN networking
The networking illustrated in
Normally, adding egress gateways is used to improve the system reliability. In this case,
how to route between multiple egresses needs to be solved.
Virtual Router Redundancy Protocol (VRRP), an error-tolerant protocol defined in RFC
2338, well solves the problem mentioned above through separating physical devices
and logical devices. In LANs with multicast or broadcast capabilities (such as Ethernet),
VRRP can avoid single point failure through establishing backup links without
modifying the configuration of dynamic routing protocols and router discovery
protocols.

1.1.1 Introduction to VRRP Group

VRRP allows you to combine a group of LAN switches (including a master and several
backups) into a VRRP group. The VRRP group functions as a virtual router, forwarding
packets as a gateway.
Actual IP address
10.100.10.2/24
Virtual IP address
10.100.10.1/24
Host 1
Figure 1-2 VRRP network diagram
Network
Switch
10.100.10.1/24
Ethernet
10.100.10.8/24
Host 2
Figure 1-1
Network
Master
Ethernet
10.100.10.7/24 10.100.10.8/24
Host 2
10.100.10.9/24
Host 3
requires high stability of the default gateway.
Actual IP address
10.100.10.3/24
Backup
Virtual IP address
10.100.10.1/24
10.100.10.9/24
Host 3
1-2
Chapter 1 VRRP Configuration