R1#sh run | b interface Loopback1
interface Loopback1
 no ip address
 ipv6 address 2017:17:17::1/128
!
interface Tunnel0
 no ip address
 no ip redirects
 ipv6 address 2002:B428:742::1/128
 tunnel source Ethernet0/0
 tunnel mode ipv6ip 6to4
!
router bgp 140
 no synchronization
 bgp router-id 1.1.1.1
 bgp log-neighbor-changes
 neighbor 2005:0:102:0:212:7FFF:FE80:F4A0 remote-as 230
 no neighbor 2005:0:102:0:212:7FFF:FE80:F4A0 activate
 neighbor 2005:0:104:0:230:85FF:FEF3:7020 remote-as 140
 no neighbor 2005:0:104:0:230:85FF:FEF3:7020 activate
 neighbor 2017:17:17::7 remote-as 700
 neighbor 2017:17:17::7 ebgp-multihop 2
 neighbor 2017:17:17::7 update-source Loopback1
 no neighbor 2017:17:17::7 activate
 no auto-summary
 !
 address-family ipv6
 neighbor 2005:0:102:0:212:7FFF:FE80:F4A0 activate
 neighbor 2005:0:104:0:230:85FF:FEF3:7020 activate
 neighbor 2017:17:17::7 activate
 network 2000:1:1::/64
 network 2005:0:104::/64
 exit-address-family
!





R7#sh run | b interface Loopback1
interface Loopback1
 no ip address
 ipv6 address 2017:17:17::7/128
!
interface Tunnel0
 no ip address
 no ip redirects
 ipv6 address 2002:B428:701::7/128
 tunnel source FastEthernet0/1
 tunnel mode ipv6ip 6to4
!
!
router bgp 700
 no synchronization
 bgp router-id 7.7.7.7
 bgp log-neighbor-changes
 neighbor 2005:0:237:0:212:7FFF:FE7D:3A00 remote-as 230
 neighbor 2005:0:237:0:212:7FFF:FE7D:3A00 ebgp-multihop 2
 no neighbor 2005:0:237:0:212:7FFF:FE7D:3A00 activate
 neighbor 2005:0:702:0:212:7FFF:FE80:F4A0 remote-as 230
 no neighbor 2005:0:702:0:212:7FFF:FE80:F4A0 activate
 neighbor 2017:17:17::1 remote-as 140
 neighbor 2017:17:17::1 ebgp-multihop 2
 neighbor 2017:17:17::1 update-source Loopback1
 no neighbor 2017:17:17::1 activate
 no auto-summary
 !
 address-family ipv6
 neighbor 2005:0:237:0:212:7FFF:FE7D:3A00 activate
 neighbor 2005:0:702:0:212:7FFF:FE80:F4A0 activate
 neighbor 2017:17:17::1 activate
 network 2000:7:7::/64
 network 2005:0:237::/64
 network 2005:0:702::/64
 exit-address-family
!