Figure 10: 0-5 Sub-Ring Configuration Example - Alcatel-Lucent 7210 SAS M Service Manual

RPL Node
Sub-Ring configuration is similar to Major Ring configuration and consists of three parts: Eth-ring
instance configuration, Control VPLS configuration and data VPLS configuration (data instance
or data channel). The Eth-ring configuration of a Sub-Ring is tied to a major ring and only one
path is allowed. Note that a split horizon group is mandatory to ensure that Sub-Ring control
messages from the major ring are only passed to the Sub-Ring control.
The Data VPLS can be configured on the major ring, and in the example, shares the same VID
(SAP encapsulation) on both the Major Ring and the Sub-ring to keep data on the same VLAN ID
everywhere. (Note that just like other services in the 7210 SAS the encapsulation VID is
controlled by SAP configuration and the association to the controlling ring is by the eth-ring ring-
id.)
7210 SAS M Services Guide
B
7450
b
Ring Link
a
C
7450
Sub-ring Port
a
a
E
7450
Ring APS - ERP - Control Channel
Ring Data Channels

Figure 10: 0-5 Sub-Ring Configuration Example

RPL Link ERP1
ERP1
Inter Connection Link
Virtual Channel
Or Non-virtual Channel
ERP2
RPL Link ERP2
Services
RPL Owner Node
ERP1
A
7450
b
a
D
7450
Sub-ring Port
a
a
RPL Owner Node
ERP2
F
7450
OSSG533
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