Compaq SW3324, SW3323, SW3322 LEDs, Full Duplex Mode, Flow Control, Virtual LANs VLANs, 14Overview

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1-14Overview

LEDs

The port LEDs on the switch provide a quick and accurate display of the integrity of switch connections and switch mode. The operation of the RJ-45 port LEDs can be changed by use of the LED mode button on the switch front panel. The LED mode button does not affect the operation of the fiber port LEDs. The default operation of the RJ-45 LEDs indicates Link (L) and Activity (A) for each of the ports. When the LED mode button is pressed (pressed and held in), the operation of the RJ-45 LEDs changes to indicate full/half duplex and 10/100 Mb/s speeds, respectively.

Full Duplex Mode

The full duplex mode of operation on a port can double the throughput of switch connections. This mode disables the collision detection portion of the Ethernet Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol, allowing for two-way traffic. Full duplex is configurable using the Duplex Mode parameter in the Port Menu of the console menus or via SNMP.

Flow Control

Flow control allows you to manage network traffic during congestion periods and to prevent the loss of packets when port buffer thresholds are exceeded. The SW3322/SW3323/SW3324 can receive pause frames being sent to it, and stop sending traffic on that port. You can configure this ability to receive and respond to pause frames on a port-by-port basis. The switch receives pause frames per the IEEE 802.3x standard.

Virtual LANs (VLANs)

VLANs allow you to connect users to a specific LAN segment regardless of their physical location. The switch supports tagged VLANs per the IEEE 802.1Q draft standard. With frame tagging, a short tag is appended to every frame that crosses the network backbone. The tag identifies which VLAN the frame belongs to. See Appendix C, “Virtual LANs (VLANs),” for more information about this feature.