Feature Overview - Cisco SFE2000 Release Note

1 February 2007

Feature Overview

This section describes the device features. For details regarding the system functionalities, refer to the
User's Guide.
General Features
Power over Ethernet (On SFE2000P and SGE2000P only)
Power over Ethernet (PoE) provides power to devices over existing LAN cabling, without updating or
modifying the network infrastructure. Power over Ethernet removes the necessity of placing network
devices next to power sources.
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.
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.
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.
Virtual Cable Testing (VCT)
VCT detects and reports copper link cabling occurrences, such as open cables and cable shorts.
Optical Transceiver Analysis
The Finisar optical transceiver provides access to a set of parameters that can be monitored and
displayed to the system administrator.
MDI/MDIX Support
The device automatically detects whether the cable connected to an RJ-45 port is crossed or straight
through, when auto-negotiation is enabled. 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).
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.
Linksys One Ready Communications Solution SFE2000/
SFE2000P and SGE2000/SGE2000P
RELEASE NOTES
Linksys One Ready Communications Solution
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