P
ORT
C
ONFIGURATION
3-11Configuring Interface Connections
Use the Port Controls pages to enable/disable an interface, set
auto-negotiation, or manually set the speed and duplex mode, and flow
control parameters.
Field Attributes
•State – Allows you to manually disable an interface. You can disable an
interface due to abnormal behavior (e.g., excessive collisions), and then
reenable it after the problem has been resolved. You may also disable an
interface for security reasons.
•Autonegotiation – Enables/disables auto-negotiation.
•Speed – Allows manual selection of port speed.
•Duplex – Allows manual selection of duplex mode.
•Flow Control – Allows manual selection of flow control.
Flow control can eliminate frame loss by “blocking” traffic from end
stations or segments connected direct ly to the switch when its buffers
fill. When enabled, back pressure is used for half-duplex operation and
IEEE 802.3x for full-duplex operation. (Avoid using flow control on a
port connected to a hub unless it is actually required to solve a problem.
Otherwise back pressure jamming signals may degrade overall
performance for the segment attached to the hub.)
Note: Autonegotiation must be disabled before you can c onfigure or
force the interface to use the Speed, Duplex mode or Flow
Control options.
Web – Click Administrator
=>
Port Controls. Modify the required interface
settings, and click Apply.