ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised auto-negotiation: Yes Speed: 100Mb/s
I'd expect that to mean that it was connected to a 100Mb switch port or a managed switch configured to force 100Mb.
But then I tried this. Typing:
ethtool --change eth0 speed 1000 duplex full autoneg on
DID work! But I wonder why it didn't pick up on that automagically.
But then that wouldn't have worked either.
And thanks, Les, for the ethtool reminder/tip!
Mii-tool does some of the same things but won't show/force 1000BaseT. Also, you can put ETHTOOL_OPTS=... in your ifcfg-eth? files if you need to force something odd.
Are you using cat 5e or cat 6 (gigabit certified) cable?
-- Eero