> On the other end is an OpenBSD box providing NAT services to this > private network, You are using a cross-over cable? > And as I said, when I install Redhat, this same box works fine. Yes, that can happen. The autonegotiation is controlled via the mii registers on the card, and different distributions may initialize this differently. You may want to install the mii-diag package and see what it says about your card. Eric