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If the peer port does not support auto-negotiation or turns off this feature, the Switch determines
the connection speed by detecting the signal on the cable and using
half
duplex
mode. When the
Switch’s auto-negotiation is turned off, a port uses the pre-configured speed and duplex mode
when making a connection, thus requiring you to make sure that the settings of the peer port are
the same in order to connect.
Flow Control
A concentration of traffic on a port decreases port bandwidth and overflows buffer memory
causing packet discards and frame losses.IEEE802.3x flow control is used in full duplex mode
to send a pause signal to the sending port, causing it to temporarily stop sending signals when
the receiving port memory buffers fill and resend later.
The Switch uses IEEE802.3x flow control in full duplex mode and backpressure flow control in
half duplex mode. IEEE802.3x flow control is used in full duplex mode to send a pause signal to
the sending port, causing it to temporarily stop sending signals when the receiving port memory
buffers fill. Back Pressure flow control is typically used in half duplex mode to send a "collision"
signal to the sending port (mimicking a state of packet collision) causing the sending port to
temporarily stop sending signals and resend later.
Note: 1000 Base-T doesn’t support force mode.
Cable Test.
This feature determines the quality of the cables, shorts, and cable impedance mismatch, bad
connectors, termination mismatch, and bad magnetics. The feature can work on the copper
Ethernet cable only.
Default Settings
The default port Speed & Duplex is auto for all ports.
The default port Flow Control is Off for all ports.
5.4.2.
CLI Configuration
Node
Command
Description
enable
show interface IFNAME
This command displays the current port
configurations.
configure interface IFNAME
This command enters the interface
configure node.
interface
show
This command displays the current port
configurations.
interface
loopback (none | mac)
This command tests the loopback mode of
operation for the specific port.
interface
flowcontrol (off | on)
This command disables / enables the flow
control for the port.
interface
speed (auto|10-full||10-half| 100-
full|100-half|1000-full)
This command configures the speed and
duplex for the port.
interface
shutdown
This command disables the specific port.
interface
no shutdown
This command enables the specific port.
