The Dell™ PowerConnect™ 3248 Fast Ethernet Managed Switch offers the following features:
48 10/100BASE-TX auto-sensing Fast Ethernet switching ports
Two 10/100/1000BASE-T auto-sensing Gigabit Ethernet switching ports that operate in combination with two Small Form Factor Pluggable (SFP) transceiver slots
IEEE 802.3u, IEEE 802.3z, and IEEE 802.3ab compliant
Up to 8 kilobyte (KB)-entry, media access control (MAC) address cache
IEEE 802.3x flow control for full duplex operation
IEEE 802.1Q based tagged virtual local area network (VLAN)
IEEE 802.1p Class of Service (CoS) through four priority queues for each port
IEEE 802.3ad link aggregation, up to six aggregated trunks per switch
Spanning tree protocol
Broadcast storm control
Internet group management protocol (IGMP) snooping support
Back pressure flow control for half-duplex operation
Port mirroring
Auto MDI/MDIX support for the 10/100BASE-TX and the 10/100/1000BASE-T ports
MAC addresses lookup based on port, VLAN ID, and MAC addresses
Redundant power supply (RPS) support for uninterrupted operation
System light-emitting diode (LED) and per port LEDs
The front panel of the switch contains the console port, all of the Ethernet ports, LEDs, and the Mode select button. As shown in the following figure, the switch has three system LEDs and one LED for each port. The following sections describe the front panel in more detail.
You can access the console interface from the RS-232 serial port or a Telnet connection. The console port uses a standard null-modem cable. For instructions on configuring your switch using the console, see "Management Interface."
One LED shows the operating status of each Fast Ethernet and Gigabit Ethernet port. Each port LED has two modes of operation—link/activity or full duplex—which you can select using the Mode toggle button. Details of the LED indications are provided in each of the following sections.
Connect the optional RPS to the RPS connector. If the switch's internal power unit fails, the redundant power system automatically supplies power to the switch for uninterrupted operation.
The switch supports the Dell PowerConnect RPS-600 external redundant power system.
NOTE: See the RPS-600
documentation for more
information.
CAUTION: Do not use the switch with any redundant power system other than the Dell PowerConnect RPS-600.
NOTE: To access the
switch through a web
browser, the computer
running the web browser
must have IP-based
network access to the
switch.
After you have successfully installed the switch, you can configure the switch, monitor the LED panel, and display statistics graphically using a web browser, such as Netscape Navigator (version 6.2 and higher) or Microsoft® Internet Explorer (version 5.0).
You can also connect a computer or terminal to the serial console port or use Telnet to access the switch. The command-line-driven interface provides complete access to all switch management features. Most of the common commands are described in "Management Interface." For a full list of commands, see the Command Line Reference, which is included on the documentation CD.
You can manage the switch with an SNMP-compatible console program. The switch is compatible with SNMP version 1.0.
The SNMP agent decodes the incoming SNMP messages and responds to requests with MIB objects stored in the database. The SNMP agent updates the MIB objects every 5 seconds to generate statistics and counters.
The switch supports a comprehensive set of MIB extensions:
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