Two fiber ports models can be configured for Directed Switch Mode and Fiber
Redundancy (per DIP-switches 3 and 4), traffic is forwarded to both the primary
and secondary fiber ports. The secondary port will block all traffic while the primary
port is active. When the primary port goes down, the secondary port will be active
and all traffic will be forwarded out the secondary port (F2).
Directed Switch Mode with Fiber Redundancy
Dual Device Mode
Dual Device Mode is only supported on GPoE+/Si with two fiber ports.
When configured for Dual Device Mode, the GPoE+/Si is configured as two logically
independent Layer 2 switches. On the 4-Port models, fiber port F1 is associated
with RJ-45 Ports P1 - P2 and fiber port F2 is associated with RJ-45 Ports P3 - P4.
On the 8-Port models, fiber port F1 is associated with RJ-45 Ports P1 - P4 and fiber
port F2 is associated with RJ-45 Ports P5 - P8. Data flow will follow MAC address
mapping.
Dual Device Mode
Page 7
On the 4-Port models configured for Dual Device Mode and Directed Switch Mode,
the traffic from Ports 1 - 2 is only forwarded to fiber port F1 and Ports 3 - 4 are only
forwarded to fiber port F2. On the 8-Port models configured for Dual Device Mode
and Directed Switch Mode, the traffic from Ports 1 - 4 is only forwarded to fiber port
F1 and Ports 5 - 8 are only forwarded to fiber port F2. This prevents broadcast
traffic from flooding other network ports. Incoming traffic from F1 and F2 follows
MAC address mapping.
Dual Device with Directed Switch Mode
SW3 and SW4: Fiber Redundancy
SW3 and SW4 are valid on models with two fiber ports.
The modes are described with MAC learning enabled. When MAC learning is
disabled, the GPoE+/Si will send data to all ports.
SW3
SW4
Function
DOWN
DOWN
Switch Mode (factory default)
DOWN
UP
Switch Mode (factory default)
UP
DOWN
Redundant Mode - no return to primary (F1)
UP
UP
Redundant Mode - return to primary (F1)
Fiber Redundancy
Fiber redundancy is only supported on GPoE+/Si models with two fiber ports.
When configured for Redundant Mode “no return to primary”, the fiber ports operate
as redundant links. A fault on the primary fiber port F1, will cause a fail over to the
secondary fiber port F2 within 50msec. F1 will become the secondary port once the
port has been restored because “no return to primary” has been selected.
Page 8
