Beta Draft Confidential
8-16
1/19/05
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Over MPLS Trunks
Configuring Feeder Logical Ports
Configuring Feeder Logical Ports
Before you can configure an ATMoMPLS Trunk logical port, you must configure an
ATMoMPLS UNI or ATMoMPLS NNI logical port with a minimal amount of
bandwidth. This acts as the feeder port, which serves the following purposes:
•
Enables interoperability between Lucent and non-Lucent switches by providing a
standard interface type over which a link management protocol can run.
•
Controls the valid range of VPI/VCI values that you can use. The feeder logical
port controls the range of VPI/VCI values indirectly. In a regular UNI logical port
configuration, you configure the VPI/VCI range directly by supplying VPI/VCI
bits. In an ATMoMPLS logical port configuration, the range of VPI/VCI values is
derived from the Trunk ID bits value. The method of calculation is not
user-configurable.
The VPI/VCI values are calculated as follows:
–
VPI bits = Trunk ID bits + 5
–
VCI bits = 14 - VPI bits
•
Controls the Trunk ID Bits value that determines the number of valid Trunk IDs.
If the physical port is configured correctly, the following LPort Type options are
available for configuring a feeder port for an ATMoMPLS trunk:
•
ATMoMPLS UNI
Supported on:
–
1-port OC-12c/STM-4 Module with 128MB on CBX 500 IOM1
–
1-Pport OC-12c/STM-4 Phy Module with 128MB on GX 550 BIO2
–
4-port OC-12c/STM-4 ATM Module on CBX 3500 Universal IOP
•
ATMoMPLS NNI
Supported on:
–
1-port OC-12c/STM-4 Phy Module with 128MB on GX 550 BIO2
–
4-port OC-12c/STM-4 ATM Module on CBX 3500 Universal IOP
To configure a feeder logical port for an ATMoMPLS trunk using Navis EMS-CBGX:
1. Expand the node for the PPort or subport to which you want to add an LPort.
The LPorts node appears under the PPort or subport node.
Summary of Contents for CBX 3500
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