Configuring OSPF and OSPFv3 1003
console(config-if-tunnel0)#tunnel destination 
20.20.20.1
console(config-if-tunnel0)#ipv6 ospf
console(config-if-tunnel0)#ipv6 ospf network 
point-to-point
console(config-if-tunnel0)#exit
8
Configure the loopback interface. The switch uses the loopback IP address 
as the OSPF and OSPFv3 router ID. 
console(config)#interface loopback 0
console(config-if-loopback0)#ip address 2.2.2.2 
255.255.255.0
console(config-if-loopback0)#exit
console(config)#exit