Nortel Networks WEB OS 212777 - Manual (Page 250)

Web OS 10.0 Application Guide
250 n Chapter 11: High Availability
212777-A, February 2002
The Alteon Web switches in Figure 11-1 have been configured as VRRP routers. Together,
they form a virtual interface router (VIR).
Figure 11-1 Example 1: VRRP Router
Web switch 1 in Figure 11-1 has its real interface configured with the IP address of the virtual
interface router and is, therefore, the IP address owner. It also becomes the virtual router mas-
ter. Web switch 2 is a virtual router backup. Its real interface is configured with an IP address
that is on the same subnet as the virtual interface router but is not the IP address of the virtual
interface router.
The virtual interface router has been assigned a VRID = 1. Therefore, both of the VRRP rout-
ers have a MAC address = 00-00-5E-00-01-01.
Internet
Router
Router
VRRP Router
VRRP Router
VRID = 1
Router #2 = Backup Standby
VR IP address = 205.178.13.226
MAC address = 00.00.SE.00.01.01
Priority = 100
IP interface = 205.178.13.225
VRID = 1
Router #1 = Master Active
VR IP address = 205.178.13.226
MAC address = 00.00.SE.00.01.01
Priority = 255
IP interface = 205.178.13.226
Virtual
Interface
Router
Host #1
Default Gateway
205.178.13.226
Web Switch 1
Web Switch 2