Dell Force10 S25-01-GE-24V FTOS 8.4.2.6 Configuraiton Guide for the E-Series T - Page 1142

www.dell.com | support.dell.com FN0001_lp Figure 59-1 shows a typical network configuration using VRRP. Instead of configuring the hosts on the 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 59-1 below, Router A is configured as the MASTER router. It is configured with the IP address 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 59-1. Basic VRRP Configuration INTERNET Router A Master Router Virtual IP 10.10.10.3 Priority 255 Interface gi 1/0 10.10.10.1 Interface gi 1/1 63.62.154.23 Interface gi 10/1 204.1.78.37 Router B Backup Router Virtual IP 10.10.10.3 Priority 100 Virtual Router Interface gi 10/0 10.10.10.2 Virtual IP Address 10.10.10.3 10.10.10.0/24 LAN Segment IP Addresses Default Gateway 10.10.10.4 10.10.10.3 10.10.10.5 10.10.10.3 10.10.10.6 10.10.10.3 For more detailed information on VRRP, refer to RFC 2338, Virtual Router Redundancy Protocol. 1142 | Virtual Router Redundancy Protocol (VRRP)