Beta Draft Confidential
Configuring CBX or GX Logical Ports
Setting Logical Port Attributes
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/053-27
Modifying the VP Shaping Mode on GX 550 Virtual UNI Logical 
Ports
Due to hardware restrictions, you cannot dynamically modify (either enable or 
disable) the configured VP Shaping mode for GX 550 BIO2 and BIO-C virtual UNI 
logical ports on which circuits are already provisioned. To reset the VP Shaping mode 
for virtual UNI logical ports:
1. Follow the steps described in “Deleting Circuits” on page 2-27 to delete all 
circuits provisioned on the virtual UNI logical port.
2. Follow the steps described in “Defining a Logical Port” on page 3-9 to access the 
VP Shaping field in the Add Logical Port dialog box for the virtual UNI logical 
port. Modify the configured VP Shaping mode as needed by enabling or disabling 
the option.
3. Re-create the previously configured circuits. 
ATM Attributes
The ATM Tab is available for UNI and NNI logical port types, as well as for ATM 
Direct Trunk logical ports residing on the GX 550. From the Add Logical Port dialog 
box, select the ATM tab (Figure 3-9 on page 3-53) and complete the fields described 
in Table 3-4 on page 3-29).