R1#sh run int tun 0
Building configuration...

Current configuration : 187 bytes
!
interface Tunnel0
 no ip address
 ipv6 address 2005:0:17::1/64
 ipv6 rip R1Rip enable
 keepalive 10 3
 tunnel source Ethernet0/0
 tunnel destination 180.40.7.1
 tunnel mode ipv6ip
end


R7#sh run int tu 0
Building configuration...

Current configuration : 192 bytes
!
interface Tunnel0
 no ip address
 ipv6 address 2005:0:17::7/64
 ipv6 rip R7Rip enable
 keepalive 10 3
 tunnel source FastEthernet0/1
 tunnel destination 180.40.7.66
 tunnel mode ipv6ip
end