# Monitoring ATM VCs and VPI/VCI Ranges Used for MPLS

#### Purpose

Display information about ATM VCs used as MPLS LSPs and VPI-VCI ranges reserved for MPLS when you use the interface label space for MPLS labels.

#### Action

To display all VCs and reserved VC ranges on the router:

    host1#show atm vc
                                          Cate Rx/Tx Rx/Tx Rx/Tx Sta
    Interface    VPI VCI  VCD  Type Encap gory Peak   Avg  Burst tus
    ------------ --- ---- ---- ---- ----- ---- ----- ----- ----- ---
    ATM 3/0.2      0 101  4375 PVC  AUTO  CBR   1000     0     0 UP
    ATM 3/0.3      0 102  4376 PVC  AUTO  CBR   1000     0     0 DOWN
    ...
    ATM 3/0.8099   1 8099 8099 PVC  SNAP  UBR      0     0     0 UP
    ATM 3/0.8100   1 8100 8100 PVC  SNAP  UBR      0     0     0 DOWN
    8000 circuit(s) found

    Reserved VCC ranges:

              Start Start End End
    Interface  VPI   VCI  VPI VCI
    --------- ----- ----- --- ---
    ATM 2/0       2   100   2 102
    ATM 2/0       3   300   3 303
    2 reservation(s) found

To display a summary of all reserved VC ranges on the router, including those reserved for MPLS use:

    host1#show atm vc reserved
    Reserved VCC ranges:

              Start Start End End
    Interface  VPI   VCI  VPI VCI
    --------- ----- ----- --- ---
    ATM 2/0       2   100   2 102
    ATM 2/0       3   300   3 303
    2 reservation(s) found

#### Meaning

Table 60 lists the show atm vc command output fields.

Table 60: show atm vc Output Fields

Field Name | Field Description
--- | ---
Interface | Interface type and number
VPI | Virtual path identifier
VCI | Virtual channel identifier
VCD | Virtual circuit descriptor
Type | Type of circuit: PVC
Encap | Encapsulation method: AUTO, AAL5, MUX, SNAP, ILMI, F4-OAM
Category | Service type configured on the VC: UBR, UBR-PCR, NRT-VBR, RT-VBR, CBR
Rx/Tx Peak | Peak rate in Kbps
Rx/Tx Avg | Average rate in Kbps
Rx/Tx Burst | Maximum number of cells that can be burst at the peak cell rate
Status | State of the virtual circuit: Up, Down
Start VPI | Starting virtual path identifier (inclusive) of the reserved VC range
Start VCI | Starting virtual circuit identifier (inclusive) of the reserved VC range
End VPI | Ending virtual path identifier (inclusive) of the reserved VC range
End VCI | Ending virtual circuit identifier (inclusive) of the reserved VC range

#### Related Topics

- show atm vc