Operation Manual – VRRP-HAH3C S7500 Series Ethernet Switches Chapter 1 VRRP Configuration1-2VRRP combines a group of LAN switches, including a master switch and severalbackup switches, into a virtual router, or a backup group.Host 1EthernetMasterNetworkHost 2Ba10.100.10.7 10.100.10.8Actual IP address10.100.10.2Actual IP10.100.10.3Virtual IP address10.100.10.1Host 3ckup10.100.10.9addressVirtual IP address10.100.10.1rFigure 1-2 Virtual routeThe switches in a backup group have the following features:z This virtual router has its own IP address: 10.100.10.1 (which can be the interfaceaddress of a switch within the backup group).z The switches within the backup group have their own IP addresses (such as10.100.10.2 for the master switch and 10.100.10.3 for the backup switch).z Hosts on the LAN only know the IP address of this virtual router, that is,10.100.10.1, but not the specific IP addresses 10.100.10.2 of the master switchand 10.100.10.3 of the backup switch.z Hosts in the LAN use the IP address of the virtual router (that is, 10.100.10.1) astheir default next-hop IP addresses.Therefore, hosts within the network will communicate with the other networks throughthis virtual router.If the master switch in the backup group goes down, the backup switch with the highestpriority functions as the new master switch to guarantee normal communicationbetween the hosts and the external networks. This ensures the communicationsbetween the hosts and the external networks.1.1.1 Virtual Router OverviewAfter you enable VRRP on the switches of a backup group, a virtual router is formed.You can perform related configuration on the virtual router.
