Allied Telesis AT-S39 - Manual (Page 269)

AT-S39 User’s Guide
269
Broadcast Storm Control Overview on page 188. For
instructions on how to set this value, refer to Setting the
Maximum Number of Broadcast Frames on page 325.
Flow Control
Flow control applies only to ports operating in full-duplex mode.
The switch uses a special pause packet to stop the end node from
sending frames. The pause packet notifies the end node to stop
transmitting for a specified period of time.
Possible settings are:
None - No flow control on the port.
Transmit - Flow control only as packets are being transmitted out
the port.
Receive - Flow control only on as packets are being received on
the port.
Both - Flow control for both packets entering and leaving the port.
Port Name/Description
This selection assigns a name to a port. The name can be from one
to fifteen alphanumeric characters. Spaces are allowed, but you
should not use special characters, such as asterisks or exclamation
points.
MDI/MDIX
This selection sets the wiring configuration of the port. The
configuration can be Auto, MDI, or MDI-X.
The twisted pair ports on the switch feature auto-MDI/MDI-X.
They configured themselves automatically as MDI or MDI-X when
connected to an end node. This allows you to use either a straight-
through twisted pair cable when connecting any type of network
device to a port on the switch.
If you disable Auto-Negotiation on a port and set a port’s speed
and duplex mode manually, the auto-MDI/MDI-X feature is also
disabled. A port where Auto-Negotiation has been disabled
defaults to MDI-X. Disabling Auto-Negotiation may require that
you manually configure a port’s MDI/MDI-X setting using this
option or use a crossover cable.
Back Pressure
This menu option only appears for ports configured for half-
duplex mode.
Backpressure performs much the same function as flow control.
Both are used by a port to control the flow of ingress packets.
Where they differ is that while flow control applies to ports
operating in full-duplex, backpressure applies to ports operating
in half-duplex mode.