Juniper e3k with ports limitied to 100Mbit and re NICs on MSI MoBo: problems with duplex negotiation (Hetzner host provider discard FreeBSD support due this bug)

[sthaug at nethelp.no]

> > May be linux driver defaults to full-duplex if autoneg fails?..
> 
> I've seen some Linux drivers fail back to half-duplex under these
> circumstances.
> 
> It may very well depend on driver version and hardware (firmware)?
> 
> I admit, I don't know what layer is responsible for handling
> autonegotiation...

It should be noted that fallback to half-duplex when autoneg fail is
actually *required* by the IEEE Ethernet standards. We may not like
it, but there it is...

Steinar Haug, Nethelp consulting, sthaug at nethelp.no