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Switch to NIC configuration

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5 replies

by artgen

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Simply put at my place of business we have Nortel 450 switches with 3COM 3C920 Intergrated Fast Ethernet Controller (3C905C-TX) in a Dell Optiplex GX110 box. What is best configuration for both NIC and switch. 100/Full Duplex at both NIC and Switchor a mix of 100/Full Duplex at switch and Hardware Defaults at card, or Autonegotiate at switch and hardware defaults at NIC. Thanks

5 replies

by stolson

It is always best to hard code (meaning putting values in for speed and duplex) rather than auto-negotiate. There have been more than a few problems caused by a failed or incorrect auto-negotiation.

If you can, run at 100/full on both sides. Check your switch for CRC errors. If you have CRC errors or problems with connections, progressively go to

100/half
10/full
10/half
auto

Again, make sure you have both sides the same.

by ealonw

Simply autonegotiate and hardware defaults makes the best match. Autosense is NIC defaults on the box so if the switch puts out 100 the box will adjust to speed. Setting a configuration should be used with multiple boxes attached to specify speeds per box.

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