3Com Switch 8800 Configuration Guide Chapter 41 VRRP Configuration41-11[LSW-B-vlan-interface2] ip address 202.38.160.2 255.255.255.0[LSW-B-vlan-interface2] quitConfigure VRRP.[LSW-B] vrrp ping-enable[LSW-B] interface vlan 2[LSW-B-vlan-interface2] vrrp vrid 1 virtual-ip 202.38.160.111[LSW-B-vlan-interface2] vrrp vrid 1 preempt-modeThe virtual router can be used soon after configuration. Host A can configure the defaultgateway as 202.38.160.111.Under normal conditions, switch A functions as the gateway, but when switch A isturned off or malfunctioning, switch B will function as the gateway instead.Configure preemption mode for switch A, so that it can resume its gateway function asthe Master after recovery.41.4.2 VRRP Tracking Interface ExampleI. Networking requirementsEven when switch A is still functioning, it may want switch B to function as gatewaywhen the Internet interface connected with it does not function properly. This can beimplemented by configuration of tracking interface.In simple language, the virtual router ID is set as 1 with additional configurations ofauthorization key and timer.II. Networking diagramSee Figure 41-3.III. Configuration ProcedureConfigure switch AConfigure VLAN2.[LSW-A] vlan 2[LSW-A-vlan2] interface vlan 2[LSW-A-vlan-interface2] ip address 202.38.160.1 255.255.255.0[LSW-A-vlan-interface2] quitEnable the function to ping the virtual IP address of virtual router.[SW8800LSW-A ] vrrp ping-enableCreate a virtual router.[LSW-A] interface vlan 2
