Context
For the PWE3 service model and network application, see Configuring the PWE3 Private Line
Service.
PWE3 encapsulation may be performed in the following typical scenarios based on user-side
service types and upstream network types.
User-Side
Service
Upstream
Network
Application
ATM
IP
Mainly used for the ATM network reconstruction. When
the IP protocol is deployed for the transmission network
and the ATM network evolves to the IP network, PWE3
encapsulation is recommended.
ATM
MPLS
Mainly used for the ATM network reconstruction. When
the MPLS protocol is deployed for the transmission
network and the ATM network evolves to the IP network,
PWE3 encapsulation is recommended.
ETH
MPLS
Mainly used for private network data interaction between
different enterprise branches.
TDM
IP
Mainly used to integrate the TDM circuit into the packet
switched network (PSN) to provide more value-added
services. When the IP protocol is deployed for the
transmission network and the IP network provides
simulated TDM services, PWE3 encapsulation is
recommended.
TDM
MPLS
Mainly used to integrate the TDM circuit into the PSN to
provide more value-added services. When the MPLS
protocol is deployed for the transmission network and the
IP network provides simulated TDM services, PWE3
encapsulation is recommended.
4.3.1 Example: Configuring ATM PWE3 to Implement Migration
from ATM Network to IP Network
ATM PWE3 applies to ATM network reconstruction. If the IP protocol is used in the transport
network, ATM PWE3 is recommended to migrate the ATM network to an IP network.
Service Requirements
l
The original ATM DSLAM is replaced by the MA5600T/MA5603T/MA5608T and the
upper-layer ATM BRAS remains.
l
ATM service data is transparently transmitted across the network.
l
The quality of service (QoS) such as traffic and priority, can be guaranteed for real-time
ATM services.
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide
4 Configuration Example of the Private Line Service
Issue 01 (2014-04-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
399