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Introduction 25
Standard wiring for end stations is Media-Dependent Interface (MDI) and the standard wiring for
hubs and switches is known as Media-Dependent Interface with Crossover (MDIX).
For information about configuring MDI/MDI for ports or LAGs, see "Defining Port Configuration"
or "Defining LAG Configuration."
Hardware Watchdog Support
The switch uses Hardware Watchdog to detect issues and take corrective action when the software
stops responding.
Auto Negotiation
Auto negotiation allows the device to advertise modes of operation. The auto negotiation function
provides the means to exchange information between two devices that share a point-to-point link
segment, and to automatically configure both devices to take maximum advantage of their
transmission capabilities.
The PowerConnect 6024/6024F enhances auto negotiation by providing port advertisement. Port
advertisement allows the system administrator to configure the port speeds advertised.
For information about auto negotiation, see "Defining Port Configuration" or "Defining LAG
Configuration."
Flow Control Support (IEEE 802.3X)
Flow control enables lower speed devices to communicate with higher speed devices by requesting
that the higher speed device refrains from sending packets. Transmissions are temporarily halted to
prevent buffer overflows.
For information about configuring flow control for ports or LAGs, see "Defining Port
Configuration" or "Defining LAG Configuration."
Head of Line Blocking Prevention
Head of Line (HOL) blocking prevents traffic delays and frame loss caused by traffic competing for
the same egress port resources. HOL blocking queues packets, and the packets at the head of the
queue are forwarded before packets at the end of the queue.
Back Pressure Support
On half-duplex links, a receiver may prevent buffer overflows by occupying the link so that it is
unavailable for additional traffic.
For information about configuring Back Pressure for ports or LAGs, see "Defining Port
Configuration" or "Defining LAG Configuration."