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Features
This section describes the device user-configured features. For a complete list of all updated device features,
refer to the latest software version Release Notes.
General Features
Head of Line Blocking
Head of Line (HOL) blocking results in 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.
Virtual Cable Testing (VCT)
VCT detects and reports copper link cabling occurrences, such as open cables and cable shorts.
Jumbo Frames Support
Jumbo frames enables transporting the identical data in fewer frames. Ensuring less overhead, lower
processing time, and fewer interrupts.
For information on enabling Jumbo Frames, see "Defining General Device Information" on page 65.
MDI/MDIX Support
The device supports auto-detection between crossed and straight-through cables.
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 on configuring MDI/MDI for ports or Link Aggregate Groups (LAGs), see "Defining Port
Parameters" on page 250 or "Configuring Load Balancing" on page 256.
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 on configuring Flow Control for ports or LAGs, see "Defining Port Parameters" on
page 250 or "Configuring Load Balancing" on page 256.
Back Pressure Support
On half-duplex links, the receiving port prevents buffer overflows by occupying the link so that it is
unavailable for additional traffic.
For information on configuring Back Pressure for ports or LAGs, see "Defining Port Parameters" on
page 250 or "Configuring Load Balancing" on page 256.
12
Introduction
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