[c-nsp] MPLS CSC

[M K]

Hi allI have configured CSC (Carrier Supporting Carrier) featuremy topology looks something like belowR6 -- R4 -- R1 -- R3 -- R2 -- R5 -- R7
R6 and R4 , R5 and R7 are running RIPv2R4 and R1 are running OSPFv2 , R2 and R5 are running OSPFv2
Now I made all the configurations and finally got that R6 can reach R7's loopback interfaceR4 is running in AS4 and R5 is running in AS5
R4#sh run | sec router bgprouter bgp 4 no bgp default ipv4-unicast bgp log-neighbor-changes neighbor 5.5.5.5 remote-as 5 neighbor 5.5.5.5 ebgp-multihop 255 neighbor 5.5.5.5 update-source Loopback0 ! address-family vpnv4  neighbor 5.5.5.5 activate  neighbor 5.5.5.5 send-community both exit-address-family ! address-family ipv4 vrf ABC  redistribute rip  no synchronization exit-address-family
R5#sh run | sec router bgprouter bgp 5 no bgp default ipv4-unicast bgp log-neighbor-changes neighbor 4.4.4.4 remote-as 4 neighbor 4.4.4.4 ebgp-multihop 255 neighbor 4.4.4.4 update-source Loopback0 ! address-family vpnv4  neighbor 4.4.4.4 activate  neighbor 4.4.4.4 send-community both exit-address-family ! address-family ipv4 vrf ABC  redistribute rip  no synchronization exit-address-family
R6#sh ip route rip R    192.1.57.0/24 [120/1] via 192.1.46.4, 00:00:12, FastEthernet0/0     7.0.0.0/32 is subnetted, 1 subnetsR       7.7.7.7 [120/2] via 192.1.46.4, 00:00:12, FastEthernet0/0R6#ping 7.7.7.7 souR6#ping 7.7.7.7 source lo0
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 7.7.7.7, timeout is 2 seconds:Packet sent with a source address of 6.6.6.6 !!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 32/44/80 msR6#tracR6#traceroute 7.7.7.7 souR6#traceroute 7.7.7.7 source lo0 numR6#traceroute 7.7.7.7 source lo0 numeric 
Type escape sequence to abort.Tracing the route to 7.7.7.7
  1 192.1.46.4 0 msec 16 msec 4 msec  2 192.1.13.1 [MPLS: Labels 22/19 Exp 0] 32 msec 52 msec 36 msec  3 192.1.13.3 [MPLS: Labels 16/20/19 Exp 0] 36 msec 44 msec 40 msec  4 192.1.25.2 [MPLS: Labels 20/19 Exp 0] 36 msec 32 msec 32 msec  5 192.1.57.5 [MPLS: Label 19 Exp 0] 36 msec 36 msec 24 msec  6 192.1.57.7 40 msec
My question is , i did not configure on R4 neighbor 5.5.5.5 next-hop-unchanged under vpnv4 AF , I have reached my destination , do i need it really or what ?
BR,