Owner's Manual

Chapter 5. Configuring Slots and Ports on a Switch | 121
NETGEAR 8800 User Manual
fault. The system then stops transmitting or receiving traffic from that link. After the fault has
been alleviated, the system puts the link back up and the traffic automatically resumes.
The NETGEAR implementation of LFS conforms to the IEEE standard 802.3ae-2002.
Although the physical link remains up, all Layer 2 and above traffic stops. The system sends
LinkDown and LinkUp traps when these events occur. Additionally, the system writes one or
more information messages to the syslog, as shown in the following example for a
NETGEAR 8800 series switch:
09/09/2004 14:59:08.03 <Info:vlan.dbg.info> MSM-A: Port 4:3 link up at
10 Gbps speed and full-duplex 
09/09/2004 14:59:08.02 <Info:hal.sys.info> MSM-A: 4:3 - remote fault
recovered.
09/09/2004 14:59:05.56 <Info:vlan.dbg.info> MSM-A: Port 4:3 link down
due to remote fault
09/09/2004 14:59:05.56 <Info:hal.sys.info> MSM-A: 4:3 - remote fault.
09/09/2004 15:14:12.22 <Info:hal.sys.info> MSM-A: 4:3 - local fault
recovered. 
09/09/2004 15:14:11.35 <Info:vlan.dbg.info> MSM-A: Port 4:3 link up at
10 Gbps speed and full-duplex
09/09/2004 15:13:33.56 <Info:vlan.dbg.info> MSM-A: Port 4:3 link down
due to local fault
09/09/2004 15:13:33.56 <Info:hal.sys.info> MSM-A: 4:3 - local fault. 
09/09/2004 15:13:33.49 <Info:vlan.dbg.info> MSM-A: Port 4:3 link down
due to local fault
Turning 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. This
feature applies to only the 10/100/1000 BASE-T ports on the switch.
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.
To disable or enable autopolarity detection, use the following command:
configure ports [<port_list> | all] auto-polarity [off | on]
Where the following is true:
• port_list—Specifies one or more ports on the switch
• all—Specifies all of the ports on the switch
• off—Disables the autopolarity detection feature on the specified ports
• on—Enables the autopolarity detection feature on the specified ports