Beta Draft Confidential
3-301/19/05 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
Valid Bits:
VCI
UNI
DCE/DTE
and NNI
Specify a value that is within the valid range for either the
NNI or UNI call header format. See page 2-13 for details.
The default value is 4.
For virtual logical ports, this field is read-only.
Note: If you are using the 3-port Channelized DS3/1 IMA
or 1-port Channelized STM-1/E1 IMA module on CBX 500
or CBX 3500 configured in UNI mode, the default value for
Number of Valid Bits in VCI is 6, based on an SVC
Connection ID Range of zero (0) to 255. When the 3-port
Channelized DS3/1 IMA module is configured in IMA
mode, the standard ATM default value is used.
GX 550
Direct Trunk
only
This field affects the amount of connection entry resource
that is reserved for virtual circuits (VCs) that traverse this
trunk endpoint. The default value of 10 translates into a
value of 2^10 or a minimum of 1024 connection entries
being reserved for VCs on the trunk. The default value of
10 is the most efficient usage of the connection entry
resource for OC3 ports. A value of 12 is the most efficient
usage of the connection entry resource for OC-12c/STM-4
and OC-48/STM-16 ports.
VCC VPI:
Start (1-15)
Virtual UNI/
NNI,
OPTimum
Trunk
Identifies the VP for the ATM logical port. Enter a number
from zero (0) - nnn. This is the VPI used for all circuits
routed over this OPTimum trunk.
Entering a value of zero (0) enables 4096 circuits to be
routed over the trunk. The range of valid VPI values
depends upon the number of valid VPI bits you set for the
ATM UNI feeder port.
For a virtual UNI/NNI logical port, this field represents the
VCC VPI of the control channels (that is, signaling and
ILMI). For more information on VPI Start and Stop values,
see page 2-16.
VCC VPI:
Stop (1-15)
Virtual UNI Specifies the maximum VPIs available.
To configure this value, use the following formula:
VCC VPI Stop <= (2
numvpibits
- 1)
where “numvpibits” equals the value you configure for the
VPI in the Valid Bits field.
Note: This value does not apply to virtual NNI logical
ports. You can assign one VCC VPI value for virtual NNI
logical ports (not a range).
Table 3-4. Add Logical Port: ATM Tab Fields (Continued)
Field Logical Port Action/Description
To Next Page
Loading...
