LE-C Set QOS

This option allows you to set Quality of Service parameters for the LE-C interface

  1. Enter the Max Reserved Bandwidth Acceptable for a VCC.

    This parameter applies to both Data Direct VCC calls received by the LEC and Data Direct VCC calls placed by the LEC. For incoming calls, this parameter defines the maximum acceptable SCR for a Data Direct VCC. If SCR is not specified on the incoming call, then this parameter defines the maximum acceptable PCR for a Data Direct VCC with reserved bandwidth.

    This parameter is applied to both forward and backward directions. Calls received with traffic parameters specifying higher rates will be released. If SCR is specified on the incoming call, the call will not be rejected due to the PCR or Maximum Burst Size. The constraint imposed by this parameter is not applicable to BEST_EFFORT connections. For outgoing calls, this parameter sets an upper bound on the amount of reserved bandwidth that may be requested for a Data Direct VCC. Therefore the traffic-type and sustained-cell-rate parameters are dependent upon this parameter.

    Valid Values: Integer in the range of 0 - 155000

    Default Value: 0

  2. Select the VCC type. If QoS parameters are not negotiated, then this parameter specifies the type of calls placed by the LEC. If QoS parameters are negotiated, this parameter specifies the desired type of traffic characteristics for Data Direct VCCs. When QoS parameters are negotiated, if either the source or target LEC desires a reserved bandwidth connection and both LECs support reserved bandwidth connections (i.e., max-reserved-bandwidth > 0), then an attempt will be made to establish a reserved bandwidth Data Direct VCC between the two LECs. Otherwise, the Data Direct VCC will be a best-effort connection.

    Valid Values: Best Effort or Reserved

    Default Value: Best Effort

  3. Enter the Data-Direct VCC peak rate in Kbps.

    This parameter is the desired peak cell rate for Data Direct VCCs. If QoS parameters are not negotiated, then this parameter specifies the PCR traffic parameter for Data Direct VCC calls placed by the LEC. Otherwise, if QoS parameters are negotiated, this parameter specifies the desired PCR traffic parameter for Data Direct VCCs. The minimum of the desired PCRs of the two LECs is used for negotiated best-effort VCCs.

    When a reserved bandwidth VCC is negotiated and only one of the LECs requests a reserved bandwidth connection, then the desired PCR of that LEC is used for the Data Direct VCC subject to the upper bound imposed by the line rate of the local ATM device. If both LECs request a reserved bandwidth connection, then the maximum of the desired PCRs of the LECs is used for the Data Direct VCC subject to the upper bound imposed the line rate of the local ATM device.

    Valid Values: 0 - 155000

    Default Value: 155000

  4. Enter the Data-Direct VCC sustained rate in Kbps.

    This parameter is the desired peak cell rate for Data Direct VCCs. If QoS parameters are not negotiated, then this parameter specifies the PCR traffic parameter for Data Direct VCC calls placed by the LEC. Otherwise, if QoS parameters are negotiated, this parameter specifies the desired PCR traffic parameter for Data Direct VCCs. The minimum of the desired PCRs of the two LECs is used for negotiated best-effort VCCs.

    When a reserved bandwidth VCC is negotiated and only one of the LECs requests a reserved bandwidth connection, then the desired PCR of that LEC is used for the Data Direct VCC subject to the upper bound imposed by the line rate of the local ATM device. If both LECs request a reserved bandwidth connection, then the maximum of the desired PCRs of the LECs is used for the Data Direct VCC subject to the upper bound imposed the line rate of the local ATM device.

    Valid Values: 0 - 155000

    Default Value: none

  5. Enter the QoS Class for Reserved Bandwidth Calls.

    This parameter sets the desired QoS class for reserved bandwidth calls. If QoS parameters are not negotiated, then this parameter specifies the QoS Class to be used for reserved bandwidth Data Direct VCC calls placed by the LEC. Otherwise, if QoS parameters are negotiated, this parameter specifies the QoS Class that is desired for Data Direct VCCs. Unspecified QoS Class is always used on best-effort calls. Specified QoS Classes define objective values for ATM performance Specified QoS Classes define objective values for ATM performance parameters such as cell loss ratio and cell transfer delay.

    The UNI Specification states that:

    LECs must be able to accept calls with any of the above QoS Classes. When QoS parameters are negotiated, the configured QoS Classes of the two LECs are compared, and the QoS Class with the more stringent requirements is used.

    Valid Values: 0 - 4

    Default Value: 0

  6. Enter the Max Burst Size in frames.

    This parameter sets the desired maximum burst size for Data Direct VCCs. If QoS parameters are not negotiated, then this parameter specifies the Maximum Burst Size traffic parameter for Data Direct VCC calls placed by the LEC. Otherwise, if QoS parameters are negotiated, this parameter specifies the desired Maximum Burst Size traffic parameter for Data Direct VCCs.

    When a reserved bandwidth VCC is negotiated and only one of the LECs requests a reserved bandwidth connection, then the desired Maximum Burst Size of that LEC is used for the Data Direct VCC. If both LECs request a reserved bandwidth connection, then the maximum of the desired Maximum Burst Sizes of the LECs is used for the Data Direct VCC.

    In any case (negotiation or not), the Maximum Burst Size is signalled only when SCR is signalled. Although this parameter is expressed in units of cells, it is configured as an integer multiple of the Maximum Data Frame Size (specified in LEC's C3 parameter) with a lower bound of 1.

    Valid Values:

    Default Value:

  7. Click Yesto Validate Peak Cell Rate of Best Effort VCCs.

    Valid Values: Yes or No

    Default Value: No

  8. Click Yesto Enable Cell Rate Negotiation for Data Direct VCCs

    Valid Values: Yes or No

    Default Value: No

  9. Click to Accept Qos Configuration Parameters from LECS

    Valid Values: Yes or No

    Default Value: Yes

Select the Submit button.


LE-C Remove QOS

This option allows you to remove Quality of Service parameters for the LE-C interface

  1. Enter the Max Reserved Bandwidth Acceptable for a VCC.

    Valid Values: integer in the range of 0 - 155000

    Default Value: 0

  2. Select the VCC type.

    Valid Values: Best Effort or Reserved

    Default Value: Best Effort

  3. Enter the VCC peak rate in Kbps.

    Valid Values: 0 - 155000

    Default Value: 155000

  4. Enter the VCC sustained rate in Kbps.

    Valid Values: 0 - 155000

    Default Value: none

  5. Enter the QoS Class for VCCs .

    Valid Values: 0 - 4

    Default Value: 0

  6. Enter the Max Burst Size in frames .

    Valid Values:

    Default Value:

Select the Submit button.