Services
7210 SAS M Services Guide Page 55
Figure 10: 0-5 Sub-Ring Configuration Example
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.)
A
7450
RPL Link ERP1
RPL Link ERP2
Ring APS - ERP - Control Channel
ERP1
Inter Connection Link
Virtual Channel
Or Non-virtual Channel
ERP2
b
a
a
a
b
a
a
a
RPL Node
Ring Link
D
7450
B
7450
C
7450
F
7450
E
7450
OSSG533
RPL Owner Node
RPL Owner Node
ERP1
ERP2
Sub-ring Port Sub-ring Port
Ring Data Channels
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