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Lucent Technologies CBX 3500 User Manual

Lucent Technologies CBX 3500
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Beta Draft Confidential
9-41/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Over MPLS Gateway Solution on CBX 3500
ATM Over MPLS Application Overview
The Layer 2 tunnel acts as a VNN Direct Trunk or PNNI link, as VNN or PNNI, or
both, can be tunneled across the Layer 2 tunnel, using PWE3 encapsulation. However,
the MPLS network can be built on any vendor’s network equipment. The MPLS
infrastructure is based on published MPLS standards, using PW encapsulation.
Service-specific PDUs are encapsulated, sent to an ingress port, then carried across a
path or tunnel. Timing and order is managed in order to emulate the behavior and
characteristics of the native service.
Figure 9-1 illustrates this Layer 2 configuration, showing multiple VNN and/or PNNI
circuits being tunneled through the Layer 2 tunnel. Multiple Layer 2 tunnels can be
multiplexed into a single PSN tunnel.
Figure 9-1. Layer 2 Tunnel Over MPLS Core Network
Supported Modules
The switches on the edge of the ATM network must be CBX 3500 switches. This
application is supported on the following CBX 3500 modules:
4-Port OC-12c/STM-4 IOA (on a POS ULC)
1-Port OC-48c/STM-16 IOA (on a POS ULC)
For configuration information, see “Configuring a Layer 2 Tunnel Over MPLS Core
Network” on page 9-16.
IP/MPLS Core
ATM Network
Layer 2 Tunnel
CBX 3500
ATM Network
CBX 3500
PE to PE E-LSP/L-LSP (PSN Tunnel)
Layer 2 Tunnel
CBX 500 CBX 500
OC-12c/OC-48c POS OC-12c/OC-48c POS

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Lucent Technologies CBX 3500 Specifications

General IconGeneral
BrandLucent Technologies
ModelCBX 3500
CategorySwitch
LanguageEnglish

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