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1 Introduction
8
Link Negotiation
Related to flow control is the auto negotiation capability, in which linked devices advertise
their flow control capabilities and automatically select the best common mode of
communication.
Rare cases (for example, linking to a device that does not support auto-negotiation) may
require that auto-negotiation be disabled on a port, thereby enabling forced link on that
port. When forced link is enabled, linked devices must have matching flow control
capabilities. For example, a port that is set for forced link and reception flow control can
connect successfully only with a port that is set for forced link and transmission flow control.
Offline Diagnostics
The NIC software includes offline diagnostics programs for configuring, testing, and
troubleshooting NICs. The configuration program within the DOS diagnostics program is
used for a PC running DOS or NetWare. The 3Com NIC diagnostics program (3Com NIC
Doctor) is a Windows-based program used for a PC running Windows XP, Windows 2000,
Windows NT 4.0, Windows Millennium Edition (Windows Me), Windows 98, or Windows 95.