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SW1, SW2 - P1, P2 Auto/Manual Negotiation "AN/MAN"
When these DIP-switches are in the "AN" position (factory default), the port
automatically determines the duplex and pause modes of the connected remote
device. If the connected remote device cannot provide the proper signal to indicate
its own mode of operation, the DIP-switch should be set to the "MAN" position.
When in manual mode, no capabilities are advertised and the fiber port will operate
in full-duplex mode.
NOTE: When Port 1 and/or Port 2 is copper, the port will operate at 100Mbps
full-duplex when configured for Manual operation.
SW3 - P3 Auto/Manual Negotiation "AN/MAN"
When this DIP-switch is in the "AN" position (factory default), the port automatically
determines the duplex and pause modes of the connected remote device. When
the DIP-switch is in the "MAN" position, the port is forced to 100M FDX.
SW4 and SW5 - Port Redundancy
The module can be configured for port redundancy. When configured for port
redundancy, the module will transmit and receive traffic on the primary port (Port 1)
and no traffic on the backup port (Port 2). When a fiber failure occurs on the primary
port, the module will switch over to the backup port within 50msec.
NOTE: 50msec failover is only supported on the fiber ports.
Port Redundancy
DIP-switches SW4 and SW5 control the port redundancy mode of the module.
When SW5 is in the "NORM" (factory default) position, the ports operate in a non-
redundant (independent) mode. When SW5 is in the "1:1" position, the module is
configured for port redundancy and operates based on the position of SW4. When
SW4 is in the "RTP" (factory default) position, the module will switch back to the
primary port (Port 1) once a stable connection has been established. When SW4
is in the "OFF" position, the module will remain on the backup port (Port 2) even
when a stable connection has been established on Port 1. See Port Redundancy
Modes table for more information.
NOTE: The ports must have MAC learning disabled to perform a 50msec
switch over.
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SW4
SW5
RTP/OFF
NORM / 1:1
RTP (DOWN)
NORM (DOWN)
OFF (UP)
NORM (DOWN)
RTP (DOWN)
1:1 (UP)
OFF (UP)
1:1 (UP)
Port Redundancy Modes
SW6, SW7 and SW8 - Link Modes
These DIP-switches control the link failure behavior. The module supports eight
different link modes. It is recommended to have the DIP-switches in the DOWN
(factory default) position during the initial installation. After the circuit has been
tested and operational, configure the module for the desired mode.
SW6
SW7
SW8
(MODE 1)
(MODE 2)
(RFD)
DOWN
DOWN
DOWN
Link Segment (LS)
Asymmetrical Link Propagate
UP
DOWN
DOWN
Redundant Uplink (ALP RU)
Asymmetrical Link Propagate
DOWN
UP
DOWN
Multi-Tenant 1 (ALP MT1)
Asymmetrical Link Propagate
UP
UP
DOWN
Multi-Tenant 2 (ALP MT2)
Remote Fault Detect 3-Port
DOWN
DOWN
UP
(RFD 3P)
Asymmetrical Link Propagate +
Remote Fault Detect
UP
DOWN
UP
Redundant Uplink
(ALP+RFD RU)
Asymmetrical Link Propagate +
DOWN
UP
UP
Remote Fault Detect
Multi-Tenant 1 (ALP+RFD MT1)
Asymmetrical Link Propagate +
UP
UP
UP
Remote Fault Detect
Multi-Tenant 2 (ALP+RFD MT2)
Link Modes Descriptions
Link mode association describes the relationship between the port(s) experiencing
a fault condition and what port(s) the fault will propagate. P1+P2
faults on both Port 1 and Port 2 will propagate to Port 3. If only Port 1 or Port 2 has
a fault, the fault will not be propagated to Port 3. It requires faults on both ports to
propagate a fault condition.
NOTE: Configuring both link partners for RFD will cause a "deadly embrace"
lockup condition during a link failure. This is an illegal setting.
NOTE: The RFD link mode will only operate when the interface is configured
for Manual "MAN" operation.
Function
Non-redundant mode - independent mode
Non-redundant mode - independent mode
Redundant mode - return to primary (RTP)
Redundant mode - no return to primary
Link Mode
Port
Function
Association
Configuration
Independent
AN or MAN
P1 + P2
P3
P3
P1 & P2
P1
P2 & P3
Independent
MAN
P1 + P2
P3
MAN
P3
P1 & P2
MAN
P1
P2 & P3
MAN
P3 indicates
Page 10
AN
AN
AN
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