Extreme Networks Summit 200-24 Installation And User Manual page 78

Configuring Ports on a Switch
All ports on a stand-alone switch can be configured for half-duplex or full-duplex operation. By default,
the 10/100 Mbps ports autonegotiate the duplex setting.
To configure port speed and duplex setting, use the following command:
config ports <portlist> auto off {speed [10 | 100 | 1000]} duplex [half | full]
To configure the system to autonegotiate, use the following command:
config ports <portlist> auto on
Flow control is supported only on Gigabit Ethernet ports. It is enabled or disabled as part of
autonegotiation. If autonegotiation is set to off, flow control is disabled. When autonegotiation is turned
on, flow control is enabled.
Turning Off Autonegotiation for a Gigabit Ethernet Port
In certain interoperability situations, you may need to turn autonegotiation off on a Gigabit Ethernet
port. Even though a Gigabit Ethernet port runs only at full duplex, you must specify the duplex setting.
The following example turns autonegotiation off for port 25 (a Gigabit Ethernet port) on a stand-alone
Summit 200-24 switch:
config ports 25 auto off duplex full
Turning Off Autopolarity Detection for an Ethernet Port
The autopolarity detection feature allows the system to detect and respond to the Ethernet cable type
(straight-through vs. crossover cable) used to make the connection to the switch port. 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, the link will come up only when
a crossover cable is connected to the port. The autopolarity feature is supported only on the 10BASE-T
and 100BASE-TX switch ports, and enabled by default.
Under certain conditions, you might opt to turn autopolarity off on one or more 10BASE-T and
100BASE-TX ports. The following example turns autopolarity off for ports 3-5 on a Summit 200 series
switch:
config ports 3-5 auto-polarity off
NOTE
If you attempt to invoke this command on a Gigabit Ethernet switch port, the system displays a
message indicating that the specified port is not supported by this feature.
When autopolarity is disabled on one or more Ethernet ports, you can verify that status by using the
command:
show config
This command will list the ports for which the feature has been disabled.
You can also verify the current autopolarity status by using the command:
show ports {<portlist>} info detail
78 Summit 200 Series Switch Installation and User Guide