Motorola 7.7.4 用户手册

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You can use the CLI to set up each ATM vir tual circuit. 

Enables the WAN inter face of the Motorola Netopia® Gateway to be configured using the 
Asynchronous Transfer Mode (ATM) protocol.

n] option {on | off } 

Selects the vir tual circuit for which fur ther parameters are set. Up to eight VCCs are sup-
por ted; the maximum number is dependent on your Motorola Netopia® Operating System 
tier and the capabilities that your Ser vice Provider offers.

n] qos service-class { cbr | ubr | vbr }

Sets the Quality of Ser vice class for the specified vir tual circuit – Constant (cbr), Unspeci-
fied (ubr), or Variable (vbr) Bit Rate. 

•

ubr: No configuration is needed for UBR VCs. Leave the default value 0 (maximum line 
rate).

•

cbr: One parameter is required for CBR VCs. Enter the Peak Cell Rate that applies to 
the VC. This value should be between 1 and the line rate. You set this value according 
to specifications defined by your ser vice provider.

•

vbr: Three parameters are required for VBR VCs. Enter the Peak Cell Rate, the Sus-
tained Cell Rate, and the Maximum Burst Size that apply to the VC. You set these 
values according to specifications defined by your ser vice provider.

n] qos peak-cell-rate { 1 ...n }

If QoS class is set to 

cbr or vbr then specify the peak-cell-rate that should apply to the 

specified vir tual circuit. This value should be between 1 and the line rate.

The Peak Cell Rate (PCR) should be set to the maximum rate a PVC can oversubscribe its 
Sustained Cell Rate (SCR). The Peak Cell Rate (see below) must be less than, or equal to 
the raw WAN (DSL) bit rate. The Maximum Burst Size (MBS) is the number of cells that can 
be sent at the PCR rate, after which the PVC must fall back to the SCR rate.