Topic: Change duplex on NIC

[kokomi]

I think I have a 3COM 3c905b NIC and it is auto-negotiation to 100 half.  How do I change it to be 100 full?
Thanks,

[CharlieBrady]

I think I have a 3COM 3c905b NIC and it is auto-negotiation to 100 half.  How do I change it to be 100 full?

3c905 was designed before 100bT autonegotiation was. It doesn't autonegotiate using the N-way protocol.

Your options are (in my order of recommendation):

- get a better NIC
- put up with 100 half
- Try adding "options 3c509 xcvr=12" to /etc/modules.conf,
  then reboot, and for 100 full duplex on the remote end of
  the link

More info here:

http://www.ibiblio.org/peanut/Kernel-2.6.10/networking/3c509.txt