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Port Default Settings
The general information for configuring the device ports includes the short description of the auto- negotiation mechanism and the default settings for switching ports.
Auto-Negotiation
If connecting a NIC that does not support
If the station on the other side of the link attempts to
MDI/MDIX
The device supports
When the MDI/MDIX (Media Dependent Interface with Crossover) is enabled, the automatic correction of errors in cable selection is possible, making the distinction between a straight through cable and a crossover cable irrelevant. (The standard wiring for end stations is known as MDI (Media Dependent Interface), and the standard wiring for hubs and switches is known as MDIX.)
Flow Control
The device supports 802.3x Flow Control for ports configured with the Full Duplex mode. By default, this feature is enabled. It can be enabled per port. The flow control mechanism allows the receiving side to signal to the transmitting side that transmission must temporarily be halted to prevent buffer overflow.
Back Pressure
The device supports back pressure for ports configured to half duplex mode. By default, this feature is disabled. It can be enabled per port. The back pressure mechanism prevents the transmitting side from transmitting additional traffic temporarily. The receiving side may occupy a link so it becomes unavailable for additional traffic.
Dell PowerConnect 28xx Systems User Guide
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