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MPLS VPN using OSPF

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Hey Guys, 

I've done a pretty simple lab but I have a doubt. I have attached my topology , its better for everybody understand.

Everything is working, but I think that I've done the wrong configurations on my MPLS network.....

The weird behavior is: from R8, if I ping R7 loopback, the packet go trough MPLS (as I am expecting) but if I tracert I cant see the MPLS Labels ....

When I jump to R5 and tracert to R7 loopback using the fa0/0(VRF interface) as a source I can see the mpls labels...

 

 

 

FROM R8 TO R7 LOOPBACK

R8#traceroute 150.1.7.7

 

Type escape sequence to abort.

Tracing the route to 150.1.7.7

 

  1 172.16.58.5 64 msec 52 msec 36 msec

  2 192.168.35.3 252 msec 172 msec 348 msec

  3 192.168.13.1 324 msec 128 msec 144 msec

  4 172.16.67.6 116 msec 72 msec 96 msec

  5 172.16.67.7 224 msec *  212 msec

R8#

FROM R5 VRF INTERFACE TO R7 LOOPBACK
R5#traceroute vrf VPN 172.16.67.7
Type escape sequence to abort.
Tracing the route to 172.16.67.7
  1 192.168.35.3 [MPLS: Labels 22/29 Exp 0] 72 msec 172 msec 60 msec
  2 192.168.13.1 [MPLS: Labels 22/29 Exp 0] 60 msec 88 msec 120 msec
  3 172.16.67.6 44 msec 108 msec 132 msec
  4 172.16.67.7 108 msec *  132 msec
 shouldn't R8 be able to see the labels as weel ?

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