Ethernet speed slowed to 10T

Quicksilver M8493
OS 9.2.2
I recently rebuilt preferences due to some startup issues, got the system up and running again, but now the ethernet is slowed to a 10T speed.
The card used to run at 100T. Tried plugging in a laptop to the same network cable, same ethernet jack and it runs at 100T. Booting off firewire w/ OS9 uses the 100T speed of the card. It's something in the OS, I'm assuming a preference since that's what I rebuilt, but I can't figure it out.
I saw a post that was very similar to my issue but no answers posted. Anyone have ideas? Thanks!
http://discussions.apple.com/thread.jspa?messageID=2276917&#2276917
Various   Mac OS 9.2.x   multiple systems OSX and OS9

Thanks Vernon.
Cable swap doesn't speed it up, and same cable/jack with diff systems work fine.
Also, same cable on this G4 is at full 100T speed if I boot off a fw drive and connect to the network/internet, so it doesn't appear to be the cable itself or the G4's port.
Has to be OS related, I think.
Various Mac OS 9.2.x multiple systems OSX and OS9

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