On "dc-cs2"
router vrrp vlan 1731 name cscloudinet ip address 129.97.173.129/26 ip helper-address 129.97.15.253 tagged trk1 forbid trk2,trk3 ip ospf area 4 ip ospf passive vrrp vrid 247 owner virtual-ip-address 129.97.173.129/26 enable exit exit
On "dc-cs1"
router vrrp vlan 1731 name cscloudinet ip address 129.97.173.130/26 ip helper-address 129.97.15.253 tagged trk1 forbid trk3 ip ospf area 4 ip ospf passive vrrp vrid 247 backup virtual-ip-address 129.97.173.129/26 enable exit exit