User`s manual

EDS-828 Series Featured Functions
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ATTENTION
In a VLAN environment, you must set “Redundant Port,” “Coupling Port,” and “Coupling Control Port” as
“Trunk Port,” since these ports act as the “backbone” to transmit all packets of different VLANs to different
EDS-828 units.
Ring Coupling for a “Turbo Ring” Ring.
To configure the Ring Coupling function for a “Turbo Ring” ring, select two EDS-828 units (e.g., Switch A and
B in the above figure) in the ring, and another two EDS-828 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.
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.