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    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 1 lists the show mpls forwarding command output fields.

    Table 1: 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

     

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    Published: 2014-08-18