Alcatel-Lucent 7210 SAS-X - VLL Resilience for a Switched Pseudowire Path

Master-Slave Operation
Page 148 7210 SAS-X, R6 OS Services Guide
VLL Resilience for a Switched Pseudowire Path
Figure 21 illustrates the use of both pseudowire redundancy and pseudowire switching to provide
a resilient VLL service across multiple IGP areas in a provider network.
OSSG114
Core area
Metro area B
Metro area A
Access Node
Access Node
7x50 T-PE2
7x50 T-PE1
7x50
7x50
7x50 S-PE3
7x50 S-PE1
7x50 T-PE3
Primary PW
Standby PW
7x50
7x50
7x50
7x50 S-PE4
PW switching
SDP6:600
SDP4:400
SDP1:100
SDP3:300
7x50 S-PE2
PW switching
PW switching
PW switching