Chapter 7: VRRP Configuration Guide
70
DIGITAL GIGAswitch/Router User Reference Manual
Configuring VRRP
This section presents three sample VRRP configurations:
•
A basic VRRP configuration with one virtual router
•
A symmetrical VRRP configuration with two virtual routers
•
A multi-backup VRRP configuration with three virtual routers
Basic VRRP Configuration
Figure 4
shows a basic VRRP configuration with a single virtual router. Routers R1 and R2
are both configured with one virtual router (
VRID=1
). Router R1 serves as the Master and
Router R2 serves as the Backup. The four end hosts are configured to use 10.0.0.1/16 as
the default route. IP address 10.0.0.1/16 is associated with virtual router
VRID=1
.
Figure 4. Basic VRRP Configuration
If Router R1 should become unavailable, Router R2 would take over virtual router
VRID=1
and its associated IP addresses. Packets sent to 10.0.0.1/16 would go to Router R2. When
Router R1 comes up again, it would take over as Master, and Router R2 would revert to
Backup.
R1
R2
H1
H2
H3
H4
Default Route = 10.0.0.1/16
Master
Backup
VRID=1
10.0.0.1/16
Interface Addr. =
10.0.0.1/16
VRID=1
;
Addr. =
10.0.0.1/16
Interface Addr. =
10.0.0.2/16
VRID=1
;
Addr. =
10.0.0.1/16