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10/100 Autosense: automatically
configures to the speed of the
network (10 or 100 Mbit)
Magic Packet : Network packet
that contains unique data field to
generate a wake-up signal, causing
the PC to power on from a remote
location - useful for software
distribution, service and support.
(Magic Packet is a trademark of
Advanced Micro Devices).
Document ECG026/0498
W
P
HITE
APER
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Compaq Netelligent 10/100 TX Embedded UTP/ Coax Controller
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The Compaq Professional Workstation 5100 comes standard with the autosensing Netelligent
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10/100 TX Embedded UTP/Coax controller with Magic Packet support. The Netelligent
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Controller is a dual-speed, 32-bit bus-mastering controller, designed to take full advantage of the
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Peripheral Component Interconnect (PCI) bus architecture. It delivers excellent network
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throughput and low CPU utilization for both client and server connections. This controller
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automatically senses the network speeds and configures itself to operate in either 10Base-2,
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10Base-T, or 100Base-TX networks.
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Special features of the Netelligent Controller are:
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Fully complies with IEEE 802.3 and 802.3u specifications to ensure compatibility with all
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industry-standard 10Base-2, 10Base-T, and 100Base-TX devices.
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32-bit bus-mastering data transfer provides the highest level data transfer method between
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network and workstation. Bus-mastering relieves the CPU of managing the controller for
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high throughput and low CPU utilization.
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PCI Plug-and-Play compliance allows the 10/100 TX Embedded UTP/Coax Controller to
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automatically configure interrupt and memory addresses to conflict-free settings.
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Operates over 10Base-T or 100Base-TX so customers can maintain their investment in
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current 10 Mb/s Ethernet networking, while also allowing easy migration to high-speed
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networks as the need arises.
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Auto-negotiation support lets the 10/100-TX Embedded UTP/Coax Controller to
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automatically determine the proper network speed.
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Full duplex capable for increased bandwidth up to 20 or 200 Mb/s.
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Diagnostic LEDs indicate network speed, link integrity, and network activity for
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"at-a-glance" troubleshooting.
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Remote Wakeup
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The Netelligent network controller supports industry standard Magic Packet
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achieve Remote Wakeup functionality. Magic Packet, sometimes called Wake-On-LAN, is used to
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wake up a sleeping or powered-off Compaq Professional Workstation 5100 remotely over the
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network. This is accomplished by sending a specific packet of information, called a Magic Packet
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frame, to a node on the network.
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The Magic Packet frame contains a unique data field not normally expected in typical traffic on a
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local area network (LAN). When a Remote Wakeup-enabled NIC on a turned off workstation
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decodes this data field, Magic Packet signal is generated. This Magic Packet signal causes the PC
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to power on. The key to the Magic Packet frame is the Media Access Control (MAC) address of
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the target workstation, which is repeated 16 times. This pattern of 16 addresses in the data field
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is not expected to occur in any normal LAN frame other than the specific Magic Packet frame.
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Remote Wakeup is possible because a sleeping or powered off Compaq Professional Workstation
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5100 maintains a very low power supply to the NIC. A wire supplies 5 volts of power from the
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workstation's power supply to the NIC; power that is maintained at all times while the Compaq
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Professional Workstation 5100 is plugged into the wall socket. The NIC uses this power to turn
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on the workstation when it detects a Magic Packet frame on the network. For more information
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about Remote Wakeup, refer to Configuration Management under the Intelligent Manageability
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section.
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21
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technology to
TM
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