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    Monitoring MPLS Layer 2 Interfaces for Layer 2 Services over MPLS

    Purpose

    Display status and configuration information about MPLS layer 2 major, minor, and shim interfaces. Both the show mpls interface shim command and the show mpls l2transport interface command provide the same output. The shim keyword displays all shim interfaces. The brief keyword displays only limited interface information.

    Action

    To display information about MPLS layer 2 interfaces:

    Note: If you enable scheduler profile–based computation of service session accounting by using the service-accounting- statistics scheduler-based command, the forwarded packets and bytes fields, and the dropped packets and bytes fields are displayed in the rate-limit-profile section under the MPLS policy output heading. The committed, conformed, exceeded, saturated, and unconditional packets and bytes fields are not displayed in the rate-limit- profile section in the output of the command. These fields are displayed instead of the forwarded packets and bytes fields, and the dropped packets and bytes fields only if you disable scheduler profile-based computation of service session accounting.

    host1#show mpls interface shim
    MPLS shim interface FastEthernet2/0
      Remote PE address is 10.9.1.3
      Virtual circuit ID is 1
      Group ID is 0 by default
      Control word is not preferred by default
      Don't send sequence numbers by default
      Relay format is ethernet by default
      ATM VPI/VCI range is 1-2/100-109 (up on the line card)
      ATM VPI/VCI range is 5-10/200-300 (up on the line card)
      ATM cell aggregation is enabled
      ATM cell aggregation maximum cells per packet is 20
      ATM cell aggregation timeout timerId is 2
      Administrative state is enabled
      Operational state is down (shim interface does not have a next-hop)
      Operational MTU is 1500
      Received:
        0 packets
        0 bytes
        1 error
        0 discards
      Sent:
        0 packets
        0 bytes
        0 errors
        0 discards
    received mtu 0
    queue 0: traffic class best-effort, bound to ethernet FastEthernet2/0
        Queue length 0 bytes
        Forwarded packets 0, bytes 0
        Dropped committed packets 0, bytes 0
        Dropped conformed packets 0, bytes 0
        Dropped exceeded packets 0, bytes 0
    MPLS policy input shimRl
        classifier-group *
          0 packets, 0 bytes
          rate-limit-profile shimRl
            committed: 0 packets, 0 bytes
            conformed: 0 packets, 0 bytes
            exceeded:  0 packets, 0 bytes
      MPLS policy output shimRl
        classifier-group *
          0 packets, 0 bytes
          rate-limit-profile shimRl
            committed: 0 packets, 0 bytes
            conformed: 0 packets, 0 bytes
            exceeded:  0 packets, 0 bytes

    This excerpt from the command output shows the label information displayed when a circuit is up

    host1#show mpls l2transport interface
    ...
      Out Label 49 on  tun mpls:lsp-de090100-24-37
        0 pkts, 0 hcPkts, 0 octets
        0 hcOctets, 0 errors, 0 discardPkts
        queue 0: traffic class best-effort, bound to atm-vc ATM1/0.1
          Queue length 0 bytes 
          Forwarded packets 0, bytes 0
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0
    ...

    To display summary information about MPLS shim interfaces:

    host1#show mpls interface shim brief
                        Remote-PE   Virtual     Load
                           or       Circuit   Balancing    Admin    Oper
        Interface       LSP-name      ID        Group      state    state
    -----------------   ---------   -------   ---------   -------   -----
    FastEthernet2/0.1   222.9.1.3   200001    -           enabled   up
    FastEthernet2/0.2   222.9.1.3   200002    -           enabled   up

    Meaning

    Table 1 lists the show mpls interface and show mpls l2transport interface command output fields.

    Table 1: show mpls interface and show mpls l2transport interface Output Fields

    Field Name

    Field Description

    MPLS shim interface

    Interface specifier

    Remote PE address

    Address of the remote PE router for the layer 2 circuit

    Virtual circuit ID

    VC ID number for the interface

    Group ID

    Group ID number for the interface

    Control word

    Configuration of the control word

    Sequence number

    Statement regarding configuration of sequence number

    Relay format

    Configuration of relay format

    ATM VPI/VCI range

    Starting and ending (inclusive) virtual path identifiers and virtual circuit identifiers of the reserved VC range and whether the range specification is activated on the line module for transportation of ATM cells that belong to multiple VCs over a single pseudowire.

    ATM cell aggregation

    Concatenation of multiple ATM cells to be sent in a single MPLS-labeled packet for an ATM port, enabled or disabled.

    ATM cell aggregation maximum cells per packet

    Maximum number of ATM cells that the router can concatenate in a single packet; if this value is not configured, "ATM cell aggregation: disabled" appears instead of this field. Displayed for an ATM port (ATM AAL5 over ATM major interface).

    ATM cell aggregation timeout timerID

    Identifier (1, 2, or 3) of the ATM Martini cell packing timer that detects timeout of the cell collection threshold; if this value is not configured, "ATM cell aggregation: disabled" appears instead of this field. Displayed for an ATM port (ATM AAL5 over ATM major interface).

    Administrative state

    Administrative state, enabled or disabled

    Operational state

    Statement regarding operational state of interface

    Operational MTU

    Maximum transmission unit for the interface

    Received, Sent

    Statistics for MPLS traffic received or sent on the interface

    packets

    Number of packets received or sent

    bytes

    Number of bytes received or sent

    error

    Number of packets that are dropped for some reason at receipt or before being sent

    discards

    Number of packets that are discarded because of lack of buffer space at receipt or before being sent

    received mtu

    MTU specified in received packets

    queue, traffic class, bound to

    Queue and traffic class bound to the specified interface

    Queue length

    Number of bytes in the queue

    Forwarded packets, bytes

    Total number of packets and bytes forwarded by this interface

    Dropped committed packets, bytes

    Total number of committed packets and bytes dropped by this interface

    Dropped conformed packets, bytes

    Total number of conformed packets and bytes dropped by this interface

    Dropped exceeded packets, bytes

    Total number of exceeded packets and bytes dropped by this interface

    MPLS policy

    Type (input, output) and name of policy

    classifier-group entry

    Entry index

    packets, bytes

    Number of packets and bytes on the interface

    rate-limit-profile

    Name of profile

    Committed

    Number of packets and bytes that conform to the committed access rate

    Conformed

    Number of packets and bytes that exceed the committed access rate but conform to the peak access rate

    Exceeded

    Number of packets and bytes that exceed the peak access rate

    In label

    VC label sent by this router to upstream neighbor for route

    Out label

    VC label received by this router from downstream neighbor for route

    MPLS statistics

    MPLS statistics for traffic received or sent

    pkts

    Number of packets received or sent

    hcPkts

    Number of high-capacity (64-bit) packets received or sent

    octets

    Number of octets received or sent

    hcOctets

    Number of high-capacity (64-bit) octets received or sent

    errors

    Number of packets that are dropped for some reason at receipt or before being sent

    discardPkts

    Number of packets that are discarded because of lack of buffer space at receipt or before being sent

    Interface

    Interface specifier

    Remote-PE or LSP-name

    IP address of the remote PE router or name of the tunnel

    Virtual Circuit ID

    VC ID number for the interface

    Load Balancing Group

    Load-balancing group associated with the layer 2 Martini transport circuit

    Admin state

    Administrative state of the interface, enabled or disabled

    Oper state

    Operational state of the interface, up or down

    Published: 2014-08-18