iES28TG/iES28GF User Manual
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Coupling Ring
If two iRing topologies exist and you would like to connect the rings, a coupling ring can be
formed. Select two switches from each ring to be connected, for example, switch A and B from
Ring 1 and switch C and D from Ring 2, then decide which port on each switch will be used as the
coupling ports and then link them together. For example, port 1 of switch A to port 2 of switch C
and port 1 of switch B to port 2 of switch D. Then, enable Coupling Ring on the management page
and select the coupling ring in correspondence to the connected port. For more information on port
setting, please refer to 4.1.2 Configurations. Once the setting is completed, one of the connections
will act as the main path while the other will act as the backup path.
Dual Homing
Dual Homing is used to connect a ring topology to a RSTP network environment. Choose the two
switches (Switch A & B) from the ring to connect the switches in the RSTP network (backbone switches).
The connection of one of the switches (Switch A or B) will act as the primary path, while the other will
act as the backup path when the primary path connection fails.
