Re: Ethernet suddenly limited to 100 Mbps
On 2013-08-18 15:55:20 -0600, Bob Proulx wrote:
> I think it would be useful to double check the settings using ethtool
> to dump the current values. Maybe there will be a clue in your
> output. Here is an example from my machine.
I get the following:
xvii:~> ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 2
Transceiver: internal
Auto-negotiation: on
MDI-X: on (auto)
Cannot get wake-on-lan settings: Operation not permitted
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
> I have been using 'iperf' lately for bandwidth testing. Just getting
> a GigE connection does not mean that I get full wire speeds out of it
> end to end. So it is good to have an objective tool to test.
>
> $ iperf -s
> ...
> [ 3] 0.0-10.0 sec 904 MBytes 758 Mbits/sec
If I understand correctly, I need a second machine to test with iperf.
But I no longer have one here locally. I had done a speedtest.net test
and got something around 93 Mbps for d/l, while I had got 260 Mbps
back in June. Of course, this isn't necessarily meaningful as not
completely local, but this seems to match the 100 Mbps limit.
--
Vincent Lefèvre <vincent@vinc17.net> - Web: <http://www.vinc17.net/>
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