Cisco 3825 Software Configuration Guide - Page 27
Transportation of ATM Service via MPLS/IP (PWE3/ATM), Transparent Cell Transport Service/ATM Port Mode
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Chapter 1 Overview of the Cisco 3825 Mobile Wireless Edge Router New Features in Cisco IOS Release 12.4(16)MR1 Transportation of ATM Service via MPLS/IP (PWE3/ATM) An ATM PW is used to carry ATM cells over an MPLS network. It is an evolutionary technology that allows you to migrate all packet networks from legacy ATM networks, yet provides transport for legacy applications. Configuration for provisioning and creating the PW is done through the existing xconnect command. The following PW modes are supported in this release: • Transparent Cell Transport Service/ATM Port Mode, page 1-17 • ATM N-to-One VCC Cell Mode, page 1-17 • ATM AAL5 CPCS-SDU Mode, page 1-18 • ATM VCC Cell Relay Service, page 1-20 The following examples illustrates how different modes of PWs are configured. Transparent Cell Transport Service/ATM Port Mode ATM port mode maps the entire ATM interface to a PW. Use the xconnnect command under the interface mode to configure a port mode PW. A sample configuration is written as follows: interface ATM0/0/0 no ip address scrambling-payload atm mcpt-timers 1000 2000 3000 no atm ilmi-keepalive atm cell-packing 28 mcpt-timer 3 xconnect 99.99.99.99 100 encapsulation mpls sequencing both pvc 1/35 l2transport encapsulation aal0 ! pvc 1/36 l2transport encapsulation aal0 ! pvc 1/37 l2transport encapsulation aal0 ! ATM N-to-One VCC Cell Mode ATM N:1 VCC cell relay mode maps one or more permanent virtual circuits (PVCs) to one PW. There are two ways to configure N:1 VCC in cell relay mode: 1. When only one PVC needs to be mapped to a PW, configure the xconnect command under the PVC mode to configure a N:1 VCC cell relay mode PW. A sample configuration is written as follows: interface ATM0/0/1 no ip address load-interval 30 scrambling-payload atm mcpt-timers 1000 2000 3000 no atm ilmi-keepalive pvc 0/101 l2transport encapsulation aal0 cell-packing 28 mcpt-timer 3 OL-15667-03 Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide 1-17