Configuring PVC parameters

1. Enter system view.

system-view

N/A

2. Enter ATM interface view or ATM subinterface view.

interface atm { interface-number | interface-number.subnumber }

N/A

3. Create a PVC and enter PVC view.

pvc { pvc-name [ vpi/vci ] | vpi/vci }

By default, no PVC is created.

4. Set the AAL5 encapsulation protocol type for the PVC.

encapsulation aal5-encap

Optional.

By default, aal5snap encapsulation is adopted.

5. Start transmission and retransmission detection of operations, administration, and maintenance (OAM) F5 Loopback cells.

oam frequency frequency [ up up-count down down-count retry-frequency retry-frequency ]

Optional.

By default, OAM F5 Loopback cell transmission is disabled. However, if an OAM F5 Loopback cell is received, a response will be sent.

By default, up-count is 3, down-count is 5, and retry-frequency is 1 second.

6. Set the parameters for alarm indication signal (AIS)/ remote defect indication (RDI) alarm cell detection.

oam ais-rdi up up-seconds down down-seconds

Optional.

This command enables AIS/RDI alarm cell detection, and specifies the following:

• The PVC goes down if AIS/RDI alarm cells are received in a period specified by down-seconds (in seconds).

• The PVC goes up if no AIS/RDI alarm cells are received in a period specified by up-seconds (in seconds).

By default, a PVC goes down when one AIS/RDI alarm cell is received and goes up if no AIS/RDI alarm cells are received in the last three seconds.

7. Set the PVC service type and the rate-related parameters.

• Set the PVC's service type to constant bit rate (CBR):service cbr output-pcr [ cdvt cdvt-value ]

• Set the PVC's service type to unspecified bit rate (UBR), and set the rate-related parameters:service ubr output-pcr

• Set the PVC's service type to nrt-VBR, and set the rate-related parameters:service vbr-nrt output-pcr output-scr output-mbs

• Set the PVC's service type to rt-VBR, and set the rate-related parameters:service vbr-rt output-pcr output-scr output-mbs

Optional.

By default, the service type of a PVC is UBR.

The CDVT is 500μs by default.

You can use these four commands to set the service type and the parameters concerning transmission rate. A newly configured service type overwrites the existing one.

8. Set the maximum number of BDs allowed.

tx-bd-limit value

Optional.

The value range for the value argument varies with interface card models.