# Monitoring MPLS Labels Used for Forwarding

#### Purpose

Display information for labels being used for forwarding.

#### Action

To display information about MPLS labels used for forwarding:

    host1:vr2#show mpls forwarding
    In label: 28
      Label space: platform label space
      Owner: ldp
      Spoof check: router pe1
      Action:
        MPLS next-hop: 1, lookup on inner header/label
      Statistics:
        0 in pkts
        0 in Octets
        0 in errors
        0 in discard pkts

To display summary information about MPLS labels used for forwarding:

    host1:vr2# show mpls forwarding brief
    Platform label space

    In Label  Owner                              Action
    -------- -------- --------------------------------------
    28       ldp      lookup on inner header/label
    29       ldp      swap to 20 on ATM2/0.10, nbr 10.10.10.2
    30       ldp      lookup on inner header/label
    31       ldp      swap to 22 on ATM2/0.10, nbr 10.10.10.2
    32       ldp      swap to 23 on ATM2/0.10, nbr 10.10.10.2

#### Meaning

Table 75 lists the show mpls forwarding command output fields.

Table 75: 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

#### Related Documentation

- show mpls forwarding