USING THE HUB: Hub Configuration 23
To disable link integrity on a specific port, please follow the steps below:
1 Login to the M208 as a root user.
2 At the npsh prompt, type the following command:
config hub [
portnum
] [-]li
where portnum is the number between 1 and 8 of the port that you want to disable
link integrity.
This command is not applicable to port 9 which is the AUI port.
If the port LED stays lit even when no device is attached, this indicates that link
integrity has been turned off for that particular port.
Enabling/Disabling Reversing Receive Polarity on a Port
This feature allows you to turn off the automatic reverse receive polarity on a port. By
default, reverse receive polarity is enabled.
If you disable this feature on a port, you must ensure that you are using the correct
wiring for the port. Please see Twisted-Pair Cable Pinouts on page 21 for details.
To disable reverse receive polarity of a specific port, please follow the steps below:
1 Login to the M208 as a root user.
2 At the npsh prompt, type the following command:
config hub [
portnum
] [-]revxpol
where portnum is the number between 1 and 8 of the port that you want to disable
reverse receive polarity.
This command is not applicable to port 9 which is the AUI port.
Enabling/Disabling SQE Test on the AUI port
The SQE Test is a signal that tests the signal detection electronics in the transceiver
and lets the hub know that the collision detection circuits and signal paths are working
correctly. The SQE Test is only applicable to the AUI port and by default, the SQE
Test is disabled.
If you are using the AUI port via a external transceiver, the SQE Test signal could be
interpreted by the transceiver as a collision and may cause a collision signal to be gen-
erated to the rest of the network. Generally, when you are using an external transceiver
on the AUI port, ensure that the SQE Test is disabled.
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