On Mon, Feb 07, 2005 at 11:40:16AM +0000, Andrew.Bridgeman@xxxxxxxxxxxxxx wrote:
> I need to check to see if my Redhat machines are running on 100 Half/Full
> or 1000 Half/Full, can someone tell me how to check this from the command
> line. I have tried ifconfig but it does not tell you the speed. Any help is
> much appreciated.
ethtool is the suggested tool these days. Here's an example output
showing my GigE interface running at 100mbps Full.
[root@pe400 ~]# 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
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: umbg
Wake-on: g
Current message level: 0x00000007 (7)
Link detected: yes
If you need to change the parameters, add an entry named ETHTOOL_OPTS in
/etc/sysconfig/network-scripts/ifcfg-eth0 (or whatever your adapter name
is). The arguments will be passed directly to ethtool when the
interface is up'ed.
--
Ed Wilts, RHCE
Mounds View, MN, USA
mailto:ewilts@xxxxxxxxxx
Member #1, Red Hat Community Ambassador Program
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