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 108 lists the show mpls interface and show mpls l2transport interface command output fields.

Table 108: 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

Related Documentation