3com 3.01.01 Benutzerhandbuch

C

HAPTER

 10: R

ELIABILITY

Figure 2   Virtual Router

This virtual router has its own IP address: 10.100.10.1, which can be the actual 
interface address of a switch within the virtual router. The switches within the 
virtual router have their own IP addresses, such as 10.100.10.2 for the Master 
switch and 10.100.10.3 for the BACKUP switch. The hosts on the LAN use the IP 
address of this virtual router 10.100.10.1, but not the specific IP addresses 
10.100.10.2 of the master switch and 10.100.10.3 of the backup switch. The 
default routes for the hosts on this LAN are configured using the IP address of this 
virtual router 10.100.10.1 as their gateway. Therefore, hosts within the network 
communicate with the external network through this virtual router. If a master 
switch in the virtual router group breaks down, the backup switch functions as the 
new master switch. This avoids interrupting communication between the hosts 
and external networks.

VRRP configuration tasks are described in the following sections:

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This operation enables or disables ping response for the virtual IP address of the 
backup group. The standard VRRP protocol does not support ping response. 

Network

Actual IP address 10.100.10.2

Master

Actual IP address 10.100.10.3

Backup

Virtual IP address 10.100.10.1

Virtual IP address 10.100.10.1

Ethernet

Host 1

Host 2

Host 3

10.100.10.7

10.100.10.8

10.100.10.9