Virtual And Non-Virtual Channel - Alcatel-Lucent 7210 SAS M Service Manual

Service Entities

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.
Virtual Channel Virtual Channel
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A A
2/2/1:1 2/2/1:1
7450 7450 7450
Control Control
1/1/4:10 1/1/4:10
Data Data
1/1/4:11 1/1/4:11
1/1/1:10 1/1/1:10
1/1/4:100 1/1/4:100
1/1/1:11 1/1/1:11
1/1/1:100 1/1/1:100
C C
3/2/1:1 3/2/1:1
7450 7450 7450
Control Control 1/1/3:100 1/1/3:100
Data Data
1/1/3:11 1/1/3:11
E E
3/2/2:1 3/2/2:1
7450 7450 7450
RPL RPL
B B
7450 7450 7450
Major Ring ERP1 Major Ring ERP1
Control Control
Data Data
Virtual Channel Virtual Channel
D D
7450 7450 7450
Sub-Ring ERP2 Sub-Ring ERP2
F F
7450 7450 7450
2/2/1:1 2/2/1:1
2/4/1:1 2/4/1:1
7210 SAS M Services Guide