Beta Draft Confidential
8-401/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Over MPLS Trunks
Configuring ATMoMPLS Trunk Logical Ports
ATMoMPLS Trunk Logical Port QoS Attributes
When configuring Bandwidth Allocation settings for ATMoMPLS Trunk logical 
ports, the Dynamic option is unavailable. The default fixed values for all classes is 
25%. All Frame Relay parameters are unavailable when defining an ATMoMPLS 
Trunk logical port. The QoS tab in the Add Logical Port dialog box is shown in 
Figure 8-21.
Figure 8-21. Add Logical Port: QoS Tab
For ATMoMPLS Trunk logical ports, you can configure the fields in the QoS tab as 
described in Table 8-12.
Table 8-12. Add Logical Port: QoS Tab Fields
Column Action/Description
Class For each row in the table, this column displays the QoS class to 
which settings in other columns relate. 
Bandwidth Allocation For each service class type, select one of the following from the 
pull-down list:
Dynamic ā Not available for ATMoMPLS Trunk LPorts.
Fixed ā Specifies that a percentage of bandwidth be reserved 
for the service class. If the network requests a circuit that 
exceeds the fixed value, the circuit cannot be created. If all four 
service classes are set to Fixed, all four values should equal 
100% bandwidth.
Fixed At % If you selected Fixed in the Bandwidth Allocation column, then 
for each class enter the percentage of bandwidth you want to 
reserve for that class.
If all four service classes are set to Fixed, ensure that all four 
values add up to 100% so that you do not waste bandwidth.