SmartSwitch Router User Reference Manual 97Chapter 9: VRRP Configuration GuideConfiguration of Router R1The following is the configuration file for Router R1 in Figure 7.Router R1’s IP address on interface test is 10.0.0.1. There are three virtual routers on thisinterface:• VRID=1 – IP address=10.0.0.1/16• VRID=2 – IP address=10.0.0.2/16• VRID=3 – IP address=10.0.0.3/16Since the IP address of virtual router VRID=1 is the same as the interface’s IP address(10.0.0.1), then the router automatically becomes the address owner of virtual routerVRID=1.A priority is associated with each of the virtual routers. The priority determines whetherthe router will become the Master or the Backup for a particular virtual router. Prioritiescan have values between 1 and 255. When a Master router goes down, the router with thenext-highest priority takes over the virtual router. If more than one router has the next-highest priority, the router that has the highest-numbered interface IP address becomesthe Master.If a router is the address owner for a virtual router, then its priority for that virtual routeris 255 and cannot be changed. If a router is not the address-owner for a virtual-router, thenits priority for that virtual router is 100 by default, and can be changed by the user.Since Router R1 is the owner of the IP address associated with virtual router VRID=1, it hasa priority of 255 (the highest) for virtual router VRID=1. Lines 8 and 9 set Router R1’spriority for virtual routers VRID=2 and VRID=3 at 200. If no other routers in the VRRPconfiguration have a higher priority, Router R1 will take over as Master for virtual routersVRID=2 and VRID=3, should Router R2 or R3 go down.1: interface create ip test address-netmask 10.0.0.1/16 port et.1.1!2: ip-redundancy create vrrp 1 interface test3: ip-redundancy create vrrp 2 interface test4: ip-redundancy create vrrp 3 interface test!5: ip-redundancy associate vrrp 1 interface test address 10.0.0.1/166: ip-redundancy associate vrrp 2 interface test address 10.0.0.2/167: ip-redundancy associate vrrp 3 interface test address 10.0.0.3/16!8: ip-redundancy set vrrp 2 interface test priority 2009: ip-redundancy set vrrp 3 interface test priority 200!10: ip-redundancy start vrrp 1 interface test11: ip-redundancy start vrrp 2 interface test12: ip-redundancy start vrrp 3 interface test
