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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
LEFT
LEFT
Switch Mode (factory default)
LEFT
RIGHT
Switch Mode (factory default)
RIGHT
LEFT
Redundant Mode - no return to primary (F1)
RIGHT
RIGHT
Redundant Mode - return to primary (F1)
Uplink Redundancy
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.
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SW5: MAC Learning - “MAC Learning/Off”
When this DIP-switch is in the LEFT “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 RIGHT “Off”
position, learning is turned off and all received unicast packets are forwarded to
all ports.
SW6: Forced PoE - “Off/ PoE Forced”
This DIP-switch allows the PoE power to be forced ON when connected to a PD
with non-standard detection characteristics. The DIP-switch controls the forced
capability for the RJ-45 user ports on the module.
When this DIP-switch is in the LEFT “Off” position, all RJ-45 user port will
automatically perform the detection, classification and powering functions for the
attached PD. When this DIP-switch is in the RIGHT “PoE Forced” position, all RJ-45
user ports will provide a maximum of 60 or 100 watts of power (depending on the
model) to the PD.
SW7: L2CP - “L2CP Tunnel/Discard”
When this DIP-switch is in the LEFT “L2CP Tunnel” position (factory default), all
L2CP frames will be tunneled through the module. When this DIP-switch is in the
RIGHT “Discard” position, all L2CP frames will be discarded.
SW8: PSE Reset - “Off/PoE Reset”
The module can be configured to disable (reset) the PoE output power for 5 seconds
after a loss of receive link on any uplink port. This feature is typically used to allow
a PD to re-initialize after a failure on the incoming uplink.
When this DIP-switch is in the LEFT “Off” position (factory default), PoE output power
does not reset on a loss of receive link on any uplink port. When this DIP-switch is
in the RIGHT “PoE Reset” position, the module will disable PoE output power for 5
seconds following a loss of receive link on any uplink port.
When uplink redundancy is enabled, the loss of link on either F1 or F2 will not cause
the PD to be re-initialized even though the PSE Reset is enabled. The PD will be
re-initialized on a loss of receive link on both uplink ports.
When Dual Device Mode is enabled, the loss of receive link on a uplink port will
re-initialize the PDs associated with the that uplink port. Ports P1 and P2 will drop
PoE power when a loss of receive link on F1 is detected and ports P3 and P4 will
drop PoE power when a loss of receive link on F2 is detected.
