# Monitoring MPLS Forwarding Table for VPWS

#### Purpose

Display information about MPLS labels that are being used for forwarding. The brief keyword displays summary information for the MPLS labels.

#### Action

To display MPLS forwarding information for a particular label:

    host1#show mpls forwarding label 17
    In label: 17
      Label space: platform label space
      Owner: bgp
      Spoof check: router ERX-pe
      Action:
        MPLS next-hop: 28, l2transport to ATM2/0.100
      Statistics:
        0 in pkts
        0 in Octets
        0 in errors
        0 in discard pkts

To display brief information about MPLS forwarding for all labels:

    host1:pe1# show mpls forwarding brief

    In Label  Owner                              Action
    -------- -------- -------------------------------------------------------------
    17       bgp      l2transport to ATM2/0.100
    18       bgp      l2transport to ATM2/0.12
    26       ldp      lookup on inner header/label
    27       ldp      swap to 39 on ATM2/0.20, nbr 20.20.20.2
    28       ldp      swap to 41 on ATM2/0.20, nbr 20.20.20.2
    29       ldp      lookup on inner header/label
    30       ldp      swap to 43 on ATM2/0.20, nbr 20.20.20.2
    31       ldp      swap to 44 on ATM2/0.20, nbr 20.20.20.2
    46       ldp      swap to 40 on ATM2/0.20, nbr 20.20.20.2
    L2transport

         Interface    Owner                        Action
    --------------- -------- -----------------------------------------
    ATM2/0.12       bgp       swap to 801028, push 39 on ATM2/0.20, nbr 20.20.20.2
    ATM2/0.100      bgp      swap to 801024, push 39 on ATM2/0.20, nbr 20.20.20.2

To display MPLS forwarding information for a particular interface:

    host1:pe#show mpls forwarding interface atm2/0.100
    In label: n/a, ATM2/0.100
      Owner: bgp
      Spoof check: router erx-pe
      Action:
        MPLS next-hop: 27, label 801024, resolved by MPLS next-hop 8
          MPLS next-hop: 8, resolved by MPLS next-hop 9, peer 10.3.2.2
            MPLS next-hop: 9, label 39 on ATM2/0.20, nbr 10.20.20.2
      Statistics: Disabled

#### Meaning

Table 142 lists the show mpls forwarding command output fields.

Table 142: show mpls forwarding Output Fields

Field Name | Field Description
--- | ---
In label | Label sent to upstream neighbor for route
Out label | Label received from downstream neighbor for route
Label space | Label space in which the label is assigned
Owner | Signaling protocol that placed the label in the forwarding table: BGP, LDP, or RSVP-TE
Spoof check | Type and location of spoof checking performed on the MPLS packet, router, or interface
Action | Action taken for MPLS packets arriving with that label
in pkts | Number of packets sent with the label
in Octets | Number of octets sent with the label
in errors | Number of packets that are dropped for some reason before being sent
in discardPkts | Number of packets that are discarded due to lack of buffer space before being sent
Interface | Layer 2 interface that is a member of an L2VPN

#### Related Documentation

- show mpls forwarding