3Com XLPCI manual Make sure that your IP protocol does not compute the CRC

3-12CHAPTER 3: TROUBLESHOOTING INSTALLATION PROBLEMS

Table 3-1Frequently Asked Questions (continued)

QuestionAnswer

Does the 3C900B NIC support Windows NT version 3.51 on the DEC Alpha PC?

The 3C900B NIC network driver supports only Windows NT 4.0.

In Windows 95, what should I do if a yellow exclamation point (!) appears next to the NIC name?

1In the Device Manager, double-click Other Devices.

2Click PCI Ethernet Controller or the duplicate PCI NIC entry.

3Click Remove.

4Restart your PC.

What is the hardware IP The header checksum is a field in the IP header. When the

header checksum? NIC receives IP data, it computes the IP header checksum. If an error occurs, the packet is dropped and not passed to the protocol stack. By computing the CRC through hardware, the NIC can increase the performance of IP traffic and reduce CPU processing required by the protocol stack.

	To avoid having the CRC computed twice (once in the
	hardware and again in the software by the protocol stack),
	make sure that your IP protocol does not compute the CRC,
	or if it does, disable that function.
Does the 3C900B NIC	The 3C900B NIC does not support NetWare versions 3.11
support NetWare	or 4.0x. These versions require the use of a server driver that
versions 3.11 or 4.0x?	conforms to the HSM 3.2 specification. 3Com no longer
	develops NetWare server drivers that conform to the HSM
	3.2 specification.
What is Fast IP?	Fast IP is software that improves performance on switched
	networks. Fast IP allows end systems (workstations and
	servers) to discover switched communication paths. By
	creating switched shortcuts, Fast IP allows end stations
	to bypass the router and transfer data across wire-speed
	switched paths.
	Fast IP is part of 3Com’s DynamicAccess software, an
	advanced network driver that brings intelligence to end
	systems to provide improved network performance
	and control.
(continued)