[CentOS] hosts fail to negotiate 1000Mbps speed

Maciej Z.enczykowski wrote:
>>> IIRC, one does not need a crossover cable to connect between two 
>>> gigabit
>>> capable hosts.
>
> Agreed I think gigabit ethernet adapters _have_ to be autosensing of 
> MDI (normal) or MDI-X (crossover) to be considered gigabit capable (ie 
> within specifications). I expect the crossover adapter may be causing 
> enough interference to stop 1gbit from working thus resulting in 
> merely 100 mbits.
>

This is new information for me.

> Furthermore it is entirely possible that it's a 100mbit only crossover 
> adapter: it might not be crossing all 8 lines since gigabit uses 8 
> lines and not 4 like 100mbit...
>

I suspect that may be the case here given the above "new" information.

Cheers,