Alcatel-Lucent 7210 SAS-X - Figure 30: Access Resiliency

Virtual Private LAN Services
7210 SAS-X, R6 OS Services Guide Page 251
Different access scenarios are displayed in Figure 30 as example network diagrams dually
connected to the PBB PEs:
• Access Type A — Source devices connected by null or Dot1q SAPs
• Access Type B — One QinQ switch connected by QinQ/801ad SAPs
• Access Type C — Two or more ES devices connected by QinQ/802.1ad SAPs
Figure 30: Access Resiliency
The following mechanisms are supported for the I-VPLS:
• STP/RSTP can be used for all access types
• M-VPLS with MSTP can be used as is just for access Type A. MSTP is required for
access type B and C.
• LAG and MC-LAG can be used for access Type A and B.
• Split-horizon-group does not require residential.
B B
Null/dot1q 802.1ad/QinQ
Metro Network
CS
AS
ES
56
1 2 3 4
BB
CECE
B
C
B
A
B
CE
CE