Lucent Technologies CBX 3500 Configuration Manual page 322

Configuring ATM Over MPLS Trunks
Configuring Feeder Logical Ports
Table 8-5. Add Logical Port: ATM Tab Fields (Continued)
UNI Type
Cell Header Format
Call Admission Control
User UPC Function
8-241/19/05
Field
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Beta Draft Confidential
Action/Description
Choose one of the following options to specify whether this
connection resides on a private or public network.
Public (default) – At least one end of this connection attaches
to a public network.
Private – This connection resides completely within a private
network.
Controls the number of VPI bits in the ATM cell header for
VPCs.
UNI – 8 VPI bits are used
NNI – 12 VPI bits are used
Select this check box to reserve a percentage of bandwidth in
the VBR-NRT QoS class for ILMI.
Clear the check box (default) to release the bandwidth from a
reserved status. If the attached device cannot run ILMI, leave
ILMI disabled.
Note: To use line loopback diagnostics, you must disable ILMI
support. See the Switch Diagnostics User's Guide for
CBX 3500, CBX 500, GX 550, and B-STDX 9000 for more
information.
Specifies 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 cell loss ratio (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
"Configuring ATM Traffic Descriptors."
Chapter 12,