To display the MPLS label table information on the data plane, enter the show dataplane mpls label-table command.

vyatta@vyatta:~$ show dataplane mpls label-table with-prefix 
Label Space: 0
in label: exp-null, fec:ipv4, outgoing label: imp-null 
in label: rtr-alrt, outgoing label: imp-null 
in label: exp6-null, fec:ipv6, outgoing label: imp-null 
in label: 52480, fec:ipv4 192.166.4.0/30
        nexthop via 192.166.3.2, dp0p1s1, outgoing label: imp-null 
in label: 52481, fec:ipv4 3.3.3.3/32
        nexthop via 192.166.3.2, dp0p1s1, outgoing label: imp-null 
in label: 52482, fec:ipv4 192.166.8.0/30
        nexthop via 192.166.3.2, dp0p1s1, outgoing label: imp-null 
in label: 52484, fec:ipv4 10.0.0.0/8
        nexthop via 192.168.252.253, dp0s4
in label: 52485, fec:ipv4 192.166.2.0/30
        nexthop via 192.166.3.2, dp0p1s1, outgoing label: imp-null 
in label: 53120 (local), fec:ipv4 192.166.4.0/30
        nexthop via 192.166.3.2, dp0p1s1, outgoing label: imp-null 
in label: 53121 (local), fec:ipv4 192.166.8.0/30
        nexthop via 192.166.3.2, dp0p1s1, outgoing label: imp-null 
in label: 53128 (local), fec:ipv4 1.1.1.1/32
        nexthop via 192.166.3.2, dp0p1s1, outgoing label: 52490 
        nexthop via 192.166.1.1, dp0p1s3, outgoing label: imp-null 
in label: 53129 (local), fec:ipv4 3.3.3.3/32
        nexthop via 192.166.3.2, dp0p1s1, outgoing label: imp-null 
in label: 53130 (local), fec:ipv4 192.166.2.0/30
        nexthop via 192.166.3.2, dp0p1s1, outgoing label: imp-null