Beta Draft Confidential
3-321/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring CBX or GX Logical Ports
Setting Logical Port Attributes
User UPC
Function
UNI
DCE/DTE,
or
ATMoMPLS
UNI
Enables or disables the UPC function for PVCs and SVCs.
You can also enable or disable the UPC function for
individual PVCs. If you want to use the UPC function on a
per-PVC basis, you must enable the UPC function on the
logical port.
Enabled – (default) Enables the UPC function for circuits
on this logical port for all QoS classes, except ABR. Cells
that do not conform to the traffic parameters are dropped or
tagged as they come into the port.
Disabled – All traffic, including non-conforming traffic,
passes in through the port. If you disable the UPC function
on a logical port, QoS is no longer guaranteed on the
network due to the potential for increasing the cell loss ratio
on network circuits. For this reason, Lucent recommends
that you leave the UPC function enabled on all logical
ports.
Enabled with ABR – Enables the UPC function for circuits
on this logical port for all QoS classes, including ABR.
For information on UPC traffic parameters, see Chapter 12,
“Configuring ATM Traffic Descriptors.”
Control
UPC
Function
UNI
DCE/DTE
Enables or disables policing on a user port for control
circuits (signaling and ILMI) independent of user traffic.
The default is disabled.
Enable policing to prevent an attached device from
overloading the switch with data on the control circuit. The
switch polices the control circuit to pre-defined default
traffic characteristics (see Chapter 12). The attached device
typically needs to support per-VC shaping on the control
channels.
Note: If the attached device is another Lucent switch, do
not enable policing since the CBX 500 and GX 550 do not
support per-VC shaping on the control channels.
Table 3-4. Add Logical Port: ATM Tab Fields (Continued)
Field Logical Port Action/Description
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