3Com 3C17705, User Manual

Page: 55 / 184

Enabling and Disabling Switch 9100 Ports 55
Enabling and
Disabling
Switch 9100 Ports
By default, all ports are enabled. To enable or disable one or more ports,
use the following command:
[enable | disable] ports <portlist>
For example, to disable ports 1, 3, and 5 through 7 on the Switch 9100,
enter the following:
disable ports 1,3,5-7
Even though a port is disabled, the link remains enabled for diagnostic
purposes.
Configuring Switch
9100 Port Speed
and Duplex Setting
100/1000BASE-T Ports
By default, the Switch 9100 is configured to use autonegotiation to
determine the port speed and duplex setting for each 100/1000BASE-TX
port. The 100/1000 Mbps ports can connect to either 100BASE-TX or
1000BASE-T networks. At 1000 Mbps, all ports operate at full-duplex,
only.
Autonegotiation is mandatory for a 1000BASE-TX connection, so cannot
be disabled if a 1000BASE-TX connection is required. If you do not want
your 100/1000BASE-TX ports to autonegotiate you can select to manually
configure the speed to 100 Mbps, and the duplex setting to full or
half-duplex operation
.
To disable autonegotiation and configure port speed and duplex setting
for a fixed 100BASE-T connection, use the following command:
config ports <portlist> auto off speed 100 duplex [half |
full]
1000BASE-SX Ports
1000BASE-SX ports are statically set to 1 Gbps and full-duplex, neither of
which can be modified. By default, the ports autonegotiate. However,
you can manually disable autonegotiation, using the following command:
config ports <portlist> auto off duplex full
Enabling
Autonegotiation
To configure the switch to autonegotiate, use the following command:
config ports <portlist> auto on