In message <199910261825.LAA04662@lestat.nas.nasa.gov>Jason Thorpe writes:


>PHYs are supposed to do this when you program the ANAR register (this == send
>an NWay code word).  Often, when you set the "autonegotiate enable" bit in
>a PHY, it will perform NWay itself (and possibly self-program).

>When you set e.g. 10baseT, the ANAR is programmed with "adv. 10baseT" only.


IIRC, the LEDs on the fxp card also indicated at 100Mbit after setting
ifconfig fpx0 ifmedia 10baseT. Apologies for not being clear about
that earlier.  (It's remote. I'll double-check lights and ttcp
throughput when I'm in the same location, later today or tomorrow.)

Are you sure that just setting the ANAR is sufficient to
trigger re-negotiation?