VRRP technology is a technology that solves the problem of single point fault in the host configuration single gateway in the network, by configuring multiple routers into a VRRP group, each VRRP group fictitious a virtual router as the gateway of the host in the network. In a VRRP group, all the real routers elect a top-level router as the primary router. The forwarding of a virtual router is assumed by the primary router.
When you build a remote network connection, if you configure a VRRP backup, it can cause the backup line to be idle, wasteful, and one that allows you to consider using VRRP multiple-group backups, two links to each other, and forwarding data at the same time.
Experiment topology diagram:
1. Configure IP addresses on the router
#在RA
Enter system view, return to User view with Ctrl+z.
[Huawei]int S0/0/2
[Huawei-serial0/0/2]ip Add 200.1.1.2 30
[Huawei-serial0/0/2]int e 0/0/0
[Huawei-ethernet0/0/0]ip Add 12.1.1.1 24
#在RB
Enter system view, return to User view with Ctrl+z.
[Huawei]int s 0/0/1
[Huawei-serial0/0/1]ip Add 65.1.1.2 30
[Huawei-serial0/0/1]int e 0/0/2
[Huawei-ethernet0/0/0]ip Add 12.1.1.2 24
#在RC
Enter system view, return to User view with Ctrl+z.
[Huawei]int s 0/0/2
[Huawei-serial0/0/2]ip Add 200.1.1.1 30
[Huawei-serial0/0/2]int s 0/0/1
[Huawei-serial0/0/1]ip Add 65.1.1.1 30
[Huawei-serial0/0/1]int e 0/0/0
[Huawei-ethernet0/0/0]ip Add 172.16.1.1 24