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Legacy Forums => General Discussion (Legacy) => Topic started by: kokomi on April 14, 2005, 02:52:25 AM

Title: Change duplex on NIC
Post by: kokomi on April 14, 2005, 02:52:25 AM

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,

Title: Re: Change duplex on NIC
Post by: CharlieBrady on April 15, 2005, 12:16:40 AM

Quote from: "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?

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