Alcatel-Lucent 7750 SR - Frame Relay-To-ATM Interworking (FRF.5) VLL; Figure 41: Frame Relay-To-ATM Network Interworking (FRF.5) VLL

Virtual Leased Line Services
7750 SR OS Services Guide Page 203
Frame Relay-to-ATM Interworking (FRF.5) VLL
Figure 41: Frame Relay-to-ATM Network Interworking (FRF.5) VLL
Figure 41 provides an example of a point-to-point Frame Relay service between users where one
user is connected to an existing ATM network, the other to a 7750 PE node on an IP/MPLS
network.
This VLL is realized using an ATM AAL5 SDU pseudowire between the 7750 SR PE nodes. It is
configured by adding a FR SAP to an apipe service using vc-type atm-sdu. The 7750 SR PE2 node
performs an FRF.5 interworking function to interwork the ingress and egress data paths in addition
to the operations required in an FR and an ATM VLL.
The pseudowire is initiated using Targeted LDP signaling as specified in draft-ietf-pwe3-control-
protocol-xx.txt. The SDP can be of an MPLS or a GRE type.
ATM
IP/MPLS
IP/IPX/SNA
RFC2427
B-PDU/R-PDU
FR SSCS
AAL5 ATM
IP/IPX/SNA
RFC2427
B-PDU/R-PDU
FR SSCS
AAL5 ATM
IP/IPX/SNA
RFC2427
B-PDU/R-PDU
FR
IP/IPX/SNA
RFC2427
B-PDU/R-PDU
ATMoMPLS
MPLS
POS/GigE
IP/IPX/SNA
RFC2427
B-PDU/R-PDU
FR
CE1
CE2
PE 1
PE 2
ATM1
ATM2
APS Protected
Links
7750 SR
7750 SR
ATM3
OSSG070
FR
UNI
PVC/SPVC
FRF.5
Interworking
(FR-ATM Network
Interworking- FRF.5)
FR
UNI
ATM AAL5 SDU PW