Alcatel-Lucent 7750 SR - ATM VLL (Apipe) Services; ATM VLL for End-To-End ATM Service; Figure 31: ATM VLL for End-To-End ATM Service

Page 180 7750 SR OS Services Guide
ATM VLL (Apipe) Services
This section provides information about the Apipe service and implementation notes.
Topics in this section include:
• ATM VLL For End-to-End ATM Service on page 180
• ATM Virtual Trunk Over IP/MPLS Packet-Switched Network on page 182
• Common Configuration Tasks on page 241
→ Configuring VLL Components on page 242
− Creating an Apipe Service on page 242
• Service Management Tasks on page 285
ATM VLL For End-to-End ATM Service
Ap ipe Ser vices
Figure 31: ATM VLL for End-to-End ATM Service
ATM VLLs (Apipe) provide a point-to-point ATM service between users connected to 7750 SR
nodes on an IP/MPLS network. Users are either directly connected to a 7750 PE or through an
ATM access network. In both cases, an ATM PVC (for example, a virtual channel (VC) or a virtual
path (VP)) is configured on the 7750 PE. This feature supports local cross-connecting when users
are attached to the same 7750 PE node. VPI/VCI translation is supported in the ATM VLL.
PE1, PE2, and PE3 receive standard UNI/NNI cells on the ATM Service Access Point (SAP) that
are then encapsulated into a pseudowire packet using the N:1 cell mode encapsulation or AAL5
ATM IP/MPLS
ATM CellsATM Cells ATM CellsATMoMPLS
MPLS
POS/GigE
ATM Cells
CE1
CE2
CE3
PE 1
PE 3
PE 2
CE4
ATM1
ATM2
APS Protected
Links
7750 SR
7750 SR
7750 SR
ATM3
OSSG053
ATM
UNI
PVC/SPVC
(ATM-MPLS
Network IWF)
(ATM-MPLS
Network IWF)
ATM
UNI
ATM
UNI
ATM
UNI
ATM
PW
ATM
PW