On 13/2/18 8:51 am, Ed Greshko wrote:
On 02/13/18 05:43, Stephen Morris wrote:
I am using a home plug device to get ethernet access across the home electrical
wires. The home plug device is provide 500 Mb/s, so having seen this thread I've
checked my ethernet configuration and like Terry is saying my settings have auto
negotiate unchecked and the link speed is set at 100 Mb/s and Half Duplex. I have
not explicitly set that configuration but what I don't know, because I haven't
really taken any notice of it as I only use this connection as a backup to
wireless, is whether or not those settings have always been there. I have done any
changes to the configuration since I set it up in F26.
One can always use
ethtool <devname> to determine what is available and what the current settings are...
This is the view from the Fedora side....
This is what the Fedora side it telling the outside world what the HW supports
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
This is what the device that the Fedora system is connected to is saying what it
supports.
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
FWIW, I have never seen an advertised link speed of 500 Mb/s.
I ran the ethtool command and received the following output:
ethtool enp7s0
Settings for enp7s0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: Symmetric Receive-only
Link partner advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Cannot get wake-on-lan settings: Operation not permitted
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Link detected: yes
This surprises me, as this is saying the home plug device is only
running at 100 Mbps, but it is packaged as 500 Mbps and the device
itself has 500 Mbps physically stamped on the front of it. I did set the
manual configuration to 500 Mbps and full duplex, and when I turned on
auto negotiate and then switched it off, the link speed was reset to 100
Mbps.
regards,
Steve
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