To display MPLS forwarding information, enter the show mpls forwarding-table command.

vyatta@vyatta:~$ show mpls forwarding-table 
  Codes: > - selected FTN, p - stale FTN, B - BGP FTN, K - CLI FTN
       L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN,
       I - IGP-Shortcut, U - unknown FTN
   FEC                      Nexthop                Out-Label Out-Intf        
>L 1.1.1.1/32               192.166.3.2            52490     dp0p1s1         
                            192.166.1.1            3         dp0p1s3         
>L 3.3.3.3/32               192.166.3.2            3         dp0p1s1         
>L 192.166.2.0/30           192.166.3.2            3         dp0p1s1         
>L 192.166.4.0/30           192.166.3.2            3         dp0p1s1         
>L 192.166.8.0/30           192.166.3.2            3         dp0p1s1