LevelOne FGL-2870, Руководство по установке

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Introduction
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1
Switch Architecture
This switch employs a wire-speed, non-blocking switching fabric. This permits
simultaneous wire-speed transport of multiple packets at low latency on all ports.
These switches also features full-duplex capability on all ports, which effectively
doubles the bandwidth of each connection.
T
his switch uses store-and-forward switching to ensure maximum data integrity.
With store-and-forward switching, the entire packet must be received into a buffer
and checked for validity before being forwarded. This prevents errors from being
propagated throughout the network.
Network Management Options
This switch contains a comprehensive array of LEDs for “at-a-glance” monitoring of
network and port status. It also includes a management agent that allows you to
configure or monitor the switch using its embedded management software, or via
SNMP applications. To manage a switch, you can make a direct connection to the
RS-232 console port (out-of-band), or you can manage it through a network
connection (in-band) using Telnet, the on-board Web agent, or Windows-based
network management software.
For a detailed description of the switch’s advanced features, refer to the Fast
Ethernet Switch Management Guide .
Description of Hardware
10/100BASE-T Ports
This switch contains 24 RJ-45 ports that operate at 10 Mbps or 100 Mbps, half or full
duplex. Because all ports on both switches support automatic MDI/MDI-X operation,
you can use straight-through cables for all network connections to PCs or servers, or
to other switches or hubs. (See "10BASE-T/100BASE-TX Pin Assignments" on page
B-1.)
Each of these ports support auto-negotiation, so the optimum transmission mode
(half or full duplex), and data rate (10 or 100 Mbps) can be selected automatically. If
a device connected to one of these ports does not support auto-negotiation, the
communication mode of that port can be configured manually.
Each port also supports auto-negotiation of flow control, so the switch can
automatically prevent port buffers from becoming saturated.
SFP Slots
The Small Form Factor Pluggable (SFP) transceiver slots are shared with four of the
RJ-45 ports. In its default configuration, if an SFP transceiver (purchased
separately) is installed in a slot and has a valid link on its port, the associated RJ-45
port is disabled and cannot be used. The switch can also be configured to force the
use of an RJ-45 port or SFP slot, as required.