Input/Output Interfaces

5.8Network Interface Controller

These systems provide 10/100/1000 Mbps network support through an Intel 82579LM GbE network interface controller (NIC), a PHY component, and a RJ-45 jack with integral status LEDs (Figure 5-10). The support firmware is contained in the system (BIOS) ROM. The NIC can operate in half- or full-duplex modes, and provides auto-negotiation of both mode and speed. Half-duplex operation features an Intel-proprietary collision reduction mechanism while full-duplex operation follows the IEEE 802.3x flow control specification.

Intel Tx/Rx Data

82579LM GbE

NIC

Activity (green) LED RJ-45

 

 

 

 

Connector

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAN I/F

 

 

Tx/Rx Data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Speed (yellow/green) LED

Figure 5-10. Network Interface Controller Block Diagram

Table 5-10. LAN LED Indications

Function

Activity LED

Speed LED

 

 

 

10 MB link

Green (steady)

Off

 

 

 

100 MB link

Green (steady)

Yellow (steady)

 

 

 

1000 MB link

Green (steady)

Green (steady)

 

 

 

10 MB data transfer

Green (blinking)

Off

 

 

 

100 MB data transfer

Green (blinking)

Yellow (steady)

 

 

 

1000 MB data transfer

Green (blinking

Green (steady)

 

 

 

The NIC includes the following features:

VLAN tagging with Windows XP and Linux

Multiple VLAN support with Windows XP (and later)

Power management support for ACPI 1.1, PXE 2.0, WOL, ASF 1.0, and IPMI

Adapter teaming including support for Cisco Etherchannel and open standard IEEE802.3ad

Speed and Activity LED indicator drivers

The controller features high and low priority queues and provides priority-packet processing for networks that can support that feature. The controller's micro-machine processes transmit and receive frames independently and concurrently. Receive runt (under-sized) frames are not passed on as faulty data but discarded by the controller, which also directly handles such errors as collision detection or data under-run.

5-14

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Technical Reference Guide

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HP 8200 tower manual Network Interface Controller, LAN LED Indications, Function Activity LED Speed LED

8200 tower specifications

The HP 8200 Tower is a robust desktop computer designed for professional environments, delivering performance and expandability for a variety of business needs. This workstation is part of HP's Elite series, known for its reliability and advanced technologies, making it a sound choice for companies requiring consistent operation.

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