H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – HA
H3C S7500E Series Ethernet Switches Chapter 1 VRRP Configuration
1-1
Chapter 1 VRRP Configuration
When configuring VRRP, go to these sections for information you are interested in:
z Introduction to VRRP
z Configuring VRRP for IPv4
z Configuring VRRP for IPv6
z IPv4-Based VRRP Configuration Examples
z IPv6-Based VRRP Configuration Examples
z Troubleshooting VRRP
 Note:
At present, the interfaces that VRRP involves can only be VLAN interfaces unless
otherwise specified.
1.1 Introduction to VRRP
1.1.1 VRRP Overview
Normally, as shown in Figure 1-1, you can configure a default route with the gateway as
the next hop for every host on a network segment, allowing all packets destined to the
other network segments to be sent over the default route to the gateway and then be
forwarded by the gateway. This enables hosts on a network segment to communicate
with external networks. However, when the gateway fails, all the hosts using the
gateway as the default next-hop switch fail to communicate with the external network.
Figure 1-1 LAN networking