Beta Draft Confidential
4-24 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Logical Ports on Frame-based Modules
Defining ATM UNI DCE/DTE Logical Ports
Call Admission Control
Select this check box
(default) to reserve a percentage of
bandwidth in the VBR-NRT QoS class for ILMI. Port rejects a
circuit creation request if there is not enough available
bandwidth.
Clear the check box to release the bandwidth from a reserved
status. Port attempts to create a circuit even if there is not enough
available bandwidth (for VBR NRT and UBR queues only). If
the attached device cannot run ILMI, leave ILMI disabled.
Notes: If you disable Call Admission Control on a UNI logical
port, you are effectively disabling Lucent’s Call Master
Connection Admission Control (CAC) function on that logical
port.
Changing the value of this attribute does not admin down the
logical port.
User UPC Function
Enables or disables the usage parameter control (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 CLR 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.”
Table 4-9. Add Logical Port: ATM Tab Fields (Continued)
Field Action/Description
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