Beta Draft Confidential
Configuring ATM Logical Ports on Frame-based Modules
Defining ATM UNI DCE/DTE Logical Ports
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
1/19/05
4-19
Table 4-7.
Add Logical Port: Administrative Tab Fields
Field
Action/Description
CIR Oversubscription %
(100-1000)
Enter the CIR rate in Kbps at which the network
transfers data under normal conditions. Normal
conditions refer to a properly designed network with
ample bandwidth and switch capacity. The rate is
averaged over a minimum increment of the Committed
Rate Measurement interval (Tc).
The default value is 100.
Bandwidth (Kbps):
•
Allocated
•
Available
Enter the amount of bandwidth you want to configure
for this logical port. The default is the amount of
bandwidth remaining from the physical clock rate, less
any logical ports already configured.
To define a trunk logical port on this same physical port,
decrease the amount of bandwidth on this logical port to
ensure sufficient remaining bandwidth. For example:
Physical port clock speed: 1536 Kbps
Logical port UNI-DTE/NNI Feeder Bandwidth: 56 Kbps
Logical port Frame Relay Trunk Bandwidth: 1480 Kbps
The example configuration allocates a public data
network (PDN) trunk with 1480 Kbps bandwidth
between two Lucent switches, each attached to a PDN.
Shaping Type
Select either VC or VP for shaping:
VC – Using VC Shaping, the shaper pick list is grayed
out and the switch uses a method of dynamically
selecting a shaper for each circuit routed over the cell
trunk. To use the default VC shaping method, at least
one VC shaper must exist in the shaper range 1 – 5, at
least one in the range 6 – 10, and at least one in the range
11 – 15.
VP – To enable VP shaping, select Shaping Type VP,
then select a Shaper ID.
Bit Stuffing
Select the bandwidth that matches the bandwidth
capability of the CPE connected to this logical port.
Enables bit stuffing on T1/E1/DSX-1 ports. Bit stuffing
affects the available bandwidth of each DS0/TS0
channel on this port.
On – Provides 56 Kbps of bandwidth.
Off – Provides 64 Kbps of bandwidth.
Содержание CBX 3500
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