Dell Force10 C150 Configuration Manual page 1128

Figure 58-1
network 10.10.10.0 with the IP address of either Router A or Router B as their default router; their default
router is the IP Address configured on the virtual router. When any host on the LAN segment wants to
access the Internet, it sends packets to the IP address of the virtual router.
In Figure 58-1
of the virtual router and sends any packets addressed to the virtual router through interface GigabitEthernet
1/1 to the Internet. As the BACKUP router, Router B is also configured with the IP address of the virtual
router. If for any reason Router A becomes unavailable, VRRP elects a new MASTER Router. Router B
assumes the duties of Router A and becomes the MASTER router. At that time, Router B responds to the
packets sent to the virtual IP address.
All workstations continue to use the IP address of the virtual router to address packets destined to the
Internet. Router B receives and forwards them on interface GigabitEthernet 10/1. Until Router A resumes
operation, VRRP allows Router B to provide uninterrupted service to the users on the LAN segment
accessing the Internet.
Figure 58-1. Basic VRRP Configuration
Router A
Master Router
Virtual IP 10.10.10.3
Priority 255
10.10.10.0/24
LAN Segment
IP Addresses
Default Gateway
For more detailed information on VRRP, refer to
1128 | Virtual Router Redundancy Protocol (VRRP)
shows a typical network configuration using VRRP. Instead of configuring the hosts on the
below, Router A is configured as the MASTER router. It is configured with the IP address
Interface gi 1/1
63.62.154.23
Interface gi 1/0
10.10.10.1
10.10.10.4
10.10.10.3
INTERNET
Interface gi 10/1
204.1.78.37
Virtual Router
Virtual IP Address
10.10.10.3
10.10.10.5
10.10.10.3
RFC 2338,
Virtual Router Redundancy Protocol
Router B
Backup Router
Virtual IP 10.10.10.3
Priority 100
Interface gi 10/0
10.10.10.2
10.10.10.6
10.10.10.3
.