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Dual Device Mode
Dual Device Mode is only supported on models with two uplink ports.
When configured for Dual Device Mode, the module is configured as two logically
independent Layer 2 switches. On models with 4 RJ-45 user ports, Port F1 is
associated with ports P1 and P2 and Port F2 is associated with ports P3 and P4.
On models with 8 RJ-45 user ports, Port F1 is associated with ports P1 - P4 and
Port F2 is associated with ports P5 - P8. Data flow will follow MAC address mapping.
Dual Device Mode
When models with 4 RJ-45 user ports are configured for Dual Device Mode and
Directed Switch Mode, the traffic from ports P1 and P2 is only forwarded to uplink
port F1 and ports P3 and P4 are only forwarded to uplink port F2. When models with
8 RJ-45 user ports are configured for Dual Device Mode and Directed Switch Mode,
the traffic from ports P1 - P4 is only forwarded to uplink port F1 and ports P5 - P8
are only forwarded to uplink 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: Uplink Redundancy
Uplink redundancy mode is only supported on models with two uplink ports.
The modes are described with MAC learning enabled. When MAC learning is
disabled, the module 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)
Uplink Redundancy
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When configured for Uplink Redundant Mode “no return to primary”, the uplink
ports operate as redundant links. A fault on the primary Port F1, will cause a fail
over to the secondary Port F2 within 50msec. Port F1 will become the secondary
port once the failure condition has been restored because “no return to primary”
has been selected.
Redundant Uplink
When configured for Uplink Redundant Mode “return to primary’, a fault on the
primary Port F1, will cause a fail over to the secondary Port F2 within 50msec.
The module will return to the primary Port F1 after the failure condition has been
restored for 6 seconds.
SW5: MAC Learning - “MAC Learning/Off”
When this DIP-switch is in the DOWN “MAC Learning” position (factory default), all
ports on the module will learn the source MAC address of each received packet and
store the address so packets destined for the stored addresses can be forwarded to
the appropriate port on the module. When the DIP-switch is in the UP “Off” position,
learning is turned off and all received unicast packets are forwarded to all ports.
SW6: Pause - “Pause Off/On”
Setting the DIP-switch to the DOWN “Pause Off” position (factory default) configures
the module to advertise no Pause capability on all ports. Setting this DIP-switch to the
UP “On” position configures the module to advertise Symmetrical and Asymmetrical
Pause capability to all ports.
SW7: L2CP - “L2CP Tunnel/Discard”
When this DIP-switch is in the DOWN “L2CP Tunnel” position (factory default), all
L2CP frames will be tunneled through the module. When this DIP-switch is in the
UP “Discard” position, all L2CP frames will be discarded.
SW8: Reserved
