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

Monitoring MPLS Layer 2 Interfaces for Layer 2 Services over MPLS

Purpose

Action

Meaning

Related Documentation