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

Current configuration : 165 bytes
!
interface Tunnel0
 no ip address
 no ip redirects
 ipv6 address 2002:B428:742::/64
 ipv6 rip R1Rip enable
 tunnel source Ethernet0/0
 tunnel mode ipv6ip 6to4
end

R1#sh run | i ipv6 route
ipv6 route 2000:7:7::7/128 2002:B428:701::
ipv6 route 2002::/16 Tunnel0

R1#sh run int lo
% Incomplete command.

R1#sh run int lo0
Building configuration...

Current configuration : 72 bytes
!
interface Loopback0
 no ip address
 ipv6 address 2000:1:1::1/128
end

R1#


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

Current configuration : 169 bytes
!
interface Tunnel0
 no ip address
 no ip redirects
 ipv6 address 2002:B428:701::/64
 ipv6 rip R7Rip enable
 tunnel source FastEthernet0/1
 tunnel mode ipv6ip 6to4
end

R7#sh run | i ipv6 route
ipv6 route 2000:1:1::1/128 2002:B428::
ipv6 route 2000:1:1::1/128 Tunnel0
ipv6 route 2002::/16 Tunnel0

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

Current configuration : 72 bytes
!
interface Loopback0
 no ip address
 ipv6 address 2000:7:7::7/128
end