Turn off Autopolarity
The autopolarity feature allows the system to detect and respond to the Ethernet cable type (straight-through or crossover cable) used to make the connection to the switch port or an endstation.
This feature applies only to the 10/100/1000 BASE-T ports on the switch and copper medium on ExtremeSwitching combination ports.
When the autopolarity feature is enabled, the system causes the Ethernet link to come up regardless of the cable type connected to the port. When the autopolarity feature is disabled, you need a crossover cable to connect other networking equipment and a straight-through cable to connect to endstations. The autopolarity feature is enabled by default.
Under certain conditions, you might opt to turn autopolarity off on one or more ports.
To disable or enable autopolarity detection, use the
configure ports port_list auto-polarity [off | on]
Where the following is true:
- port_list—Specifies one or more ports on the switch
- off—Disables the autopolarity detection feature on the specified ports
- on—Enables the autopolarity detection feature on the specified ports
The following example turns autopolarity off for ports 5 to 7 on an ExtremeSwitching switch:
configure ports 5-7 auto-polarity off
When autopolarity is disabled on one or more Ethernet
ports, you can verify that status using the command:
show port information detail