Beta Draft Confidential
Configuring ATM Over MPLS Trunks
Configuration Overview
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/058-13
Configuring ATMoMPLS Trunks
Configuration of ATMoMPLS trunks is similar to configuration of ATM direct trunks
which are used to provide trunk connectivity between two directly-connected Lucent
CBX 500 or GX 550 switches.
To configure ATMoMPLS on the Lucent ATM edge switches, perform the following
steps:
Step 1. Configure physical ports.
You can define ATMoMPLS trunks on the following physical interfaces:
• 1-port OC-12c/STM-4 Module with 128MB on CBX 500 IOM1
• 1-port OC-12c/STM-4 Phy Module with 128MB on GX 550 BIO2
• 4-port OC-12c/STM-4 Module on CBX 3500 Universal IOP
See “Configuring Physical Ports for ATMoMPLS Trunks” on page 8-14.
Step 2. Configure feeder logical ports.
Before you can configure an ATMoMPLS logical port, you must first
configure an ATMoMPLS UNI or NNI logical port with a minimal amount of
bandwidth. This logical port acts as the feeder port, which enables
interoperability between Lucent and non-Lucent switches by providing a
standard interface type over which a link management protocol can run.
If the physical port is configured correctly, ATMoMPLS UNI and
ATMoMPLS NNI options for LPort Type are available when configuring a
feeder port for an ATMoMPLS trunk.
See “Configuring Feeder Logical Ports” on page 8-16.
Step 3. Configure ATMoMPLS Trunk logical ports.
After you have configured the feeder logical port, you can define a logical port
with the type set to ATMoMPLS Trunk. The ATMoMPLS Trunk option for
LPort Type is available if a feeder logical port of type ATMoMPLS UNI or
ATMoMPLS NNI has been created on the physical port.
See “Configuring ATMoMPLS Trunk Logical Ports” on page 8-34.
Step 4. Define the ATMoMPLS trunk.
After you have defined feeder and ATMoMPLS trunk logical ports, you can
configure the ATMoMPLS trunk. The trunk is configured between two
ATMoMPLS trunk logical ports.
See “Configuring the ATMoMPLS Trunk” on page 8-43.
Step 5. Use ATMoMPLS trunk OAM loopback to generate cells for the purpose of
verifying connectivity across the four paths.
See the Switch Diagnostics User’s Guide for CBX 3500, CBX 500, GX 550,
and B-STDX 9000 for information on OAM loopback.
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