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Example: ibgp over loopback

r1: 

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hostname r1
buggy
!
logging file debug ../binTmp/zzz8r1-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface loopback0
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.1 255.255.255.255
 ipv6 address 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface loopback1
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.11 255.255.255.255
 ipv6 address 4321::11 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.1 255.255.255.252
 ipv6 address 1234:1::1 ffff:ffff::
 no shutdown
 no log-link-change
 exit
!
router bgp4 1
 vrf v1
 local-as 1
 router-id 4.4.4.1
 no safe-ebgp
 address-family unicast
 neighbor 2.2.2.2 remote-as 1
 no neighbor 2.2.2.2 description
 neighbor 2.2.2.2 local-as 1
 neighbor 2.2.2.2 address-family unicast
 neighbor 2.2.2.2 distance 200
 neighbor 2.2.2.2 update-source loopback0
 redistribute connected
 exit
!
router bgp6 1
 vrf v1
 local-as 1
 router-id 6.6.6.1
 no safe-ebgp
 address-family unicast
 neighbor 4321::2 remote-as 1
 no neighbor 4321::2 description
 neighbor 4321::2 local-as 1
 neighbor 4321::2 address-family unicast
 neighbor 4321::2 distance 200
 neighbor 4321::2 update-source loopback0
 redistribute connected
 exit
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ipv4 route v1 2.2.2.2 255.255.255.255 1.1.1.2
ipv4 route v1 2.2.2.3 255.255.255.255 1.1.1.2
!
ipv6 route v1 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:1::2
ipv6 route v1 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:1::2
!
!
!
!
!
!
!
!
!
!
!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end

r2: 

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hostname r2
buggy
!
logging file debug ../binTmp/zzz8r2-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface loopback0
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.2 255.255.255.255
 ipv6 address 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface loopback1
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.12 255.255.255.255
 ipv6 address 4321::12 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.2 255.255.255.252
 ipv6 address 1234:1::2 ffff:ffff::
 no shutdown
 no log-link-change
 exit
!
interface ethernet2
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.5 255.255.255.252
 ipv6 address 1234:2::1 ffff:ffff::
 no shutdown
 no log-link-change
 exit
!
router bgp4 1
 vrf v1
 local-as 1
 router-id 4.4.4.2
 no safe-ebgp
 address-family unicast
 neighbor 2.2.2.1 remote-as 1
 no neighbor 2.2.2.1 description
 neighbor 2.2.2.1 local-as 1
 neighbor 2.2.2.1 address-family unicast
 neighbor 2.2.2.1 distance 200
 neighbor 2.2.2.1 update-source loopback0
 neighbor 2.2.2.1 route-reflector-client
 neighbor 2.2.2.3 remote-as 1
 no neighbor 2.2.2.3 description
 neighbor 2.2.2.3 local-as 1
 neighbor 2.2.2.3 address-family unicast
 neighbor 2.2.2.3 distance 200
 neighbor 2.2.2.3 update-source loopback0
 neighbor 2.2.2.3 route-reflector-client
 redistribute connected
 exit
!
router bgp6 1
 vrf v1
 local-as 1
 router-id 6.6.6.2
 no safe-ebgp
 address-family unicast
 neighbor 4321::1 remote-as 1
 no neighbor 4321::1 description
 neighbor 4321::1 local-as 1
 neighbor 4321::1 address-family unicast
 neighbor 4321::1 distance 200
 neighbor 4321::1 update-source loopback0
 neighbor 4321::1 route-reflector-client
 neighbor 4321::3 remote-as 1
 no neighbor 4321::3 description
 neighbor 4321::3 local-as 1
 neighbor 4321::3 address-family unicast
 neighbor 4321::3 distance 200
 neighbor 4321::3 update-source loopback0
 neighbor 4321::3 route-reflector-client
 redistribute connected
 exit
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ipv4 route v1 2.2.2.1 255.255.255.255 1.1.1.1
ipv4 route v1 2.2.2.3 255.255.255.255 1.1.1.6
!
ipv6 route v1 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:1::1
ipv6 route v1 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:2::2
!
!
!
!
!
!
!
!
!
!
!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end

r3: 

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hostname r3
buggy
!
logging file debug ../binTmp/zzz8r3-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface loopback0
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.3 255.255.255.255
 ipv6 address 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface loopback1
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.13 255.255.255.255
 ipv6 address 4321::13 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.6 255.255.255.252
 ipv6 address 1234:2::2 ffff:ffff::
 no shutdown
 no log-link-change
 exit
!
router bgp4 1
 vrf v1
 local-as 1
 router-id 4.4.4.3
 no safe-ebgp
 address-family unicast
 neighbor 2.2.2.2 remote-as 1
 no neighbor 2.2.2.2 description
 neighbor 2.2.2.2 local-as 1
 neighbor 2.2.2.2 address-family unicast
 neighbor 2.2.2.2 distance 200
 neighbor 2.2.2.2 update-source loopback0
 redistribute connected
 exit
!
router bgp6 1
 vrf v1
 local-as 1
 router-id 6.6.6.3
 no safe-ebgp
 address-family unicast
 neighbor 4321::2 remote-as 1
 no neighbor 4321::2 description
 neighbor 4321::2 local-as 1
 neighbor 4321::2 address-family unicast
 neighbor 4321::2 distance 200
 neighbor 4321::2 update-source loopback0
 redistribute connected
 exit
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ipv4 route v1 2.2.2.1 255.255.255.255 1.1.1.5
ipv4 route v1 2.2.2.2 255.255.255.255 1.1.1.5
!
ipv6 route v1 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:2::1
ipv6 route v1 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:2::1
!
!
!
!
!
!
!
!
!
!
!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end