Functional Architecture Intel® Server Board S5500WB TPS
Revision 1.3
Intel order number E53971-004
30
• Two internal 2x5 headers are provided, capable of supporting two optional USB 2.0
ports each, typically, one header supports Front panel USB and one supports an
internal third party management card.
• One internal low-profile 2x5 header is provided
• One Internal Type A USB vertical connector is provided for attaching standard
peripherals
• The BMC consumes 2 ports, for a total of 12 Ports
3.8 Network Interface Controller (NIC)
Network interface support is provided from the onboard Intel
®
82576 NIC, which is a single,
compact component with two fully integrated GbE Media Access Control (MAC) and Physical
Layer (PHY) ports. The Intel
®
82576 NIC provides the server board with support for dual LAN
ports designed for 10/100/1000 Mbps operation. Refer to the Intel
®
82576 Gigabit Ethernet
Controller Datasheet (Document#: 82576) for full details of the NIC feature set.
The NIC device provides a standard IEEE 802.3 Ethernet interface for 1000BASE-T, 100BASE-
TX, and 10BASE-T applications (802.3, 802.3u, and 802.3ab) and is capable of transmitting and
receiving data at rates of 1000 Mbps, 100 Mbps, or 10 Mbps.
The Intel
®
82576 NIC is powered off the main standby voltage rail via DC to DC Voltage
regulators for efficiency purposes. It is on standby power so the BMC can send out-of-band
management traffic over the RMII bus to the network during sleep state S5.
The NIC supports the normal RJ-45 LINK/Activity speed LEDs as well as the Proset ID function.
These LEDs are powered from a Standby voltage rail.
The link / activity LED (at the right of the connector) indicates network connection when on, and
transmit / receive activity when blinking. The speed LED (at the left of the connector) indicates
1000-Mbps operation when amber, 100-Mbps operation when green, and 10-Mbps when off.
The following table provides an overview of the LEDs.
Table 7. NIC Status LED
LED Color LED State NIC State
Off 10 Mbps
Green 100 Mbps
Green/Amber (Right)
Amber 1000 Mbps
On Active Connection
Green (Left)
Blinking Transmit / Receive activity
3.8.1 MAC Address Definition
The Intel
®
Server Board S5500WB has the following four MAC addresses assigned to it at the
Intel factory.
• NIC 1 MAC address
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