[c-nsp] Very basic MPLS VPN issue

[Shimol Shah]

Is MPLS/LDP enabled and up between the two boxes ? Notice the outgoing 
"untagged" in the global LFIB on both boxes. I would have expected a 
"imp-null" due to PHP

"sh mpls int <> int" on two boxes may tell you more.



On 5/3/10 2:14 PM, selamat pagi wrote:
> Setup
> CE (loopback 3 on R3 vrf BLUE )   -   PE1 R3 -    MPLS    -- PE2 R4 -- CE
> (loopback4 on R4 vrf BLUE
>
> *ping between lo 3 and lo 4 does not work. *
> both lo are in vrf BLUE
>
> - vrf routing table show routes / vpnv4 BGP neigbor is up
>
> R3#sh ip route vrf BLUE
> !
>       3.0.0.0/32 is subnetted, 1 subnets
> C       3.3.3.3 is directly connected, Loopback3
>       4.0.0.0/32 is subnetted, 1 subnets
> B       4.4.4.4 [200/0] via 150.1.4.4, 00:07:27
>
>
> R3#sh ip bgp vpnv4 all su
> !
> Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down
> State/PfxRcd
> 150.1.4.4       4   100      15      16        5    0    0 00:09:52
>
>
>
> Such a simple setup, but I just cannot figure out what's wrong.
>   Any feedback is highly welcome :-)
>
> cheers, keti
>
> Configuration / sh outputs
> ------------------------------------
> R3
> ip vrf BLUE
>   rd 1:100
>   route-target export 1:100
>   route-target import 1:100
> !
> interface Loopback3
>   ip vrf forwarding BLUE
>   ip address 3.3.3.3 255.255.255.255
> router bgp 100
>   no synchronization
>   bgp log-neighbor-changes
>   neighbor 150.1.4.4 remote-as 100
>   neighbor 150.1.4.4 update-source Loopback0
>   no auto-summary
>   !
>   address-family vpnv4
>   neighbor 150.1.4.4 activate
>   neighbor 150.1.4.4 send-community both
>   exit-address-family
>   !
>   address-family ipv4 vrf BLUE
>   redistribute connected
>   no auto-summary
>   no synchronization
>   exit-address-family
>
>
> R4
>
> ip vrf BLUE
>   rd 1:100
>   route-target export 1:100
>   route-target import 1:100
>
> interface Loopback4
>   ip vrf forwarding BLUE
>   ip address 4.4.4.4 255.255.255.255
>
> router bgp 100
>   no synchronization
>   bgp log-neighbor-changes
>   neighbor 150.1.3.3 remote-as 100
>   neighbor 150.1.3.3 update-source Loopback0
>   no auto-summary
>   !
>   address-family vpnv4
>   neighbor 150.1.3.3 activate
>   neighbor 150.1.3.3 send-community both
>   exit-address-family
>   !
>   address-family ipv4 vrf BLUE
>   redistribute connected
>   no auto-summary
>   no synchronization
>   exit-address-family
> !
>
>
> R3#sh ip cef vrf BLUE 4.4.4.4 det
> 4.4.4.4/32, version 2, epoch 0, cached adjacency to Serial2/0
> 0 packets, 0 bytes
>    tag information set
>      local tag: VPN-route-head
>      fast tag rewrite with
>          Recursive rewrite via 150.1.4.4/32, tags imposed {19}
>    via 150.1.4.4, 0 dependencies, recursive
>      next hop 150.1.13.1, Serial2/0 via 150.1.4.4/32
>      valid cached adjacency
>      tag rewrite with
>          Recursive rewrite via 150.1.4.4/32, tags imposed {19}
>
>
> R3#sh mpls forwarding-table
> Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
> tag    tag or VC   or Tunnel Id      switched   interface
> 16     Untagged    150.1.24.0/24     0          Se2/0      point2point
> 17     Untagged    150.1.4.4/32      0          Se2/0      point2point
> 18     Untagged    150.1.12.0/24     0          Se2/0      point2point
> 19     Aggregate   3.3.3.3/32[V]     0
> R3#
> R4#sh mpls forwarding-table
> Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
> tag    tag or VC   or Tunnel Id      switched   interface
> 16     Untagged    150.1.3.3/32      0          Se2/0.1    point2point
> 17     Untagged    150.1.13.0/24     0          Se2/0.1    point2point
> 18     Untagged    150.1.12.0/24     0          Se2/0.1    point2point
> 19     Aggregate   4.4.4.4/32[V]     0
> R4#
>
> R4#sh ip cef vrf BLUE 3.3.3.3
> 3.3.3.3/32, version 2, epoch 0, cached adjacency to Serial2/0.1
> 0 packets, 0 bytes
>    tag information set
>      local tag: VPN-route-head
>      fast tag rewrite with
>          Recursive rewrite via 150.1.3.3/32, tags imposed {19}
>    via 150.1.3.3, 0 dependencies, recursive
>      next hop 150.1.24.2, Serial2/0.1 via 150.1.3.3/32
>      valid cached adjacency
>      tag rewrite with
>          Recursive rewrite via 150.1.
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