Alcatel-Lucent 7210 SAS M - Virtual and Non-Virtual Channel

Service Entities
Page 54 7210 SAS M Services Guide
Virtual and Non-Virtual Channel
The 7210 SAS platform supports both the virtual channel and non-virtual channel for Sub-Ring
control communication. In the virtual channel mode, a dedicated VID, other than the Major Ring
RAPs control channel is configured as a data instance on the Major Ring. This allows the Sub-
Ring control messages and state machine logic to behave similar to a major ring. In the non-virtual
channel mode, the sub-ring is only connected by the RAPs control channels on the sub-ring itself.
This mode offers slightly less redundancy in the RAPs messaging than the virtual channel mode
since Sub-Ring RAPs messages are not propagated across the major ring. When non-virtual link is
configured, the protocol allows RPL messages over the Sub-Ring blocked link.
7450
7450
7450
7450
Major Ring ERP1
RPL
2/2/1:1
3/2/1:1
2/2/1:1
1/1/1:11
1/1/3:100
A
B
C
D
1/1/3:11
1/1/1:100
7450 7450
E
F
3/2/2:1
2/4/1:1
1/1/4:11
1/1/4:100
1/1/4:10
1/1/1:10
Sub-Ring ERP2
Control
Data
Virtual Channel
Control
Data
Control
Data
Virtual Channel
74507450
74507450
74507450
74507450
Major Ring ERP1
RPL
2/2/1:1
3/2/1:1
2/2/1:1
1/1/1:11
1/1/3:100
A
B
C
D
1/1/3:11
1/1/1:100
74507450 74507450
E
F
3/2/2:1
2/4/1:1
1/1/4:11
1/1/4:100
1/1/4:10
1/1/1:10
Sub-Ring ERP2
Control
Data
Virtual Channel
Control
Data
Control
Data
Virtual Channel