User Guide • PC3-ALLEGRO • CompactPCI
®
PlusIO CPU Board • Intel® i7-3xxx Processor
LAN Subsystem
The Ethernet LAN subsystem is composed of four Gigabit Ethernet ports: One Intel 82579LM Physical
Layer Transceiver (PHY) using the PCH QM77 internal MAC and three Intel 82574IT Gigabit Ethernet
Controllers. These devices provide also legacy 10Base-T and 100Base-TX connectivity. Two of the
Ethernet ports are fed to two RJ45 jacks located in the front panel, the others are attached to the
CompactPCI
®
PlusIO interface on J2. Each port includes the following features:
<
One PCI Express lane per Ethernet port (250MB/s)
<
1000Base-Tx (Gigabit Ethernet), 100Base-TX (Fast Ethernet) and 10Base-T (Classic Ethernet)
capability.
<
Half- or full-duplex operation.
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IEEE 802.3u, 802.3ab Auto-Negotiation for the fastest available connection.
<
Jumperless configuration (complete software-configurable).
Two bicoloured LEDs integrated into the dedicated RJ-45 connector in the front panel are used to
signal the LAN link, the LAN connection speed and activity status. A further bicoloured LED in front
panel labelled EB displays the state of the backplane network ports.
Each device is connected by a single PCI Express lane to the PCH. Their MAC addresses (unique
hardware number) are stored in dedicated FLASH/EEPROM components. The Intel Ethernet software
and drivers for the 82579 and 82574 is available from Intel's World Wide Web site for download.
When managing the board by Intel Active Management Technology (iAMT), the dedicated network
port to do so is accessible by the RJ45 connector GbE1 (the upper port within the front panel).
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