Dell PowerConnect 7048P Manual page 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
1003
Configuring OSPF and OSPFv3