Moxa Technologies EDS-408A, EDS-405A user manual Ring Coupling for a Turbo Ring V2 Ring

EDS-408A/405A Series User’s Manual		Featured Functions
	Ring Coupling for a “Turbo Ring” Ring
	Switch B	Switch D

Coupling Port

Main Path

Coupling

Control Port

Backup Path

Coupling Port

Switch A: "Coupler" Switch C

To configure the Ring Coupling function for a “Turbo Ring” ring, select two EDS units (e.g., Switch A and B in the above figure) in the ring, and another two EDS units in the adjacent ring (e.g., Switch C and D).

Decide which two ports in each switch are appropriate to be used as coupling ports, and then link them together. Next, assign one switch (e.g., Switch A) to be the “coupler,” and connect the coupler’s coupling control port with Switch B (for this example).

The coupler switch (i.e., Switch A) will monitor switch B through the coupling control port to determine whether or not the coupling port’s backup path should be recovered.

Ring Coupling for a “Turbo Ring V2” Ring

Switch B	Switch D
Coupling Port (Primary)
Main Path

Backup Path
Coupling Port (Backup)
Switch A	Switch C

Note that the ring coupling settings for a “Turbo Ring V2” ring are different from a “Turbo Ring” ring. For Turbo Ring V2, Ring Coupling is enabled by configuring the “Coupling Port (Primary)” on Switch B, and the “Coupling Port (Backup)” on Switch A only. You do not need to set up a coupling control port, so that a “Turbo Ring V2” ring does not use a coupling control line.

The “Coupling Port (Backup)” on Switch A is used for the backup path, and connects directly to an extra network port on Switch C. The “Coupling Port (Primary)” on Switch B monitors the status of the main path, and connects directly to an extra network port on Switch D. With ring coupling established, Switch A can activate the backup path as soon as it detects a problem with the main path.

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