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I installed an Intel gigabit card, it is shown as:

[root@mail ~]# ethtool eth0
Settings for eth0:
        Supported ports: [ FIBRE ]
        Supported link modes:   1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  1000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: FIBRE
        PHYAD: 0
        Transceiver: external
        Auto-negotiation: on
        Supports Wake-on: umbg
        Wake-on: g
        Current message level: 0x00000007 (7)
        Link detected: yes
[root@mail ~]#

Thereby I get errors:

[root@mail ~]# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:07:E9:0A:75:A5
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::207:e9ff:fe0a:75a5/64 Scope:Link
          RX packets:0 errors:29351806494030 dropped:4891967749005 overruns:0 frame:19567870996020
          TX packets:0 errors:9783935498010 dropped:0 overruns:0 carrier:14675903247015
          collisions:4891967749005 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Base address:0xb000 Memory:ff700000-ff720000

The other network cards are shown as "MII" and work fine. Is there any ability to change the port type from FIBER to MII? ethtool can't change it.


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Is the machine in question a blade? Why do you want to change the port type? – Dan Carley Oct 1 '09 at 11:40
No, simple machine. Intel pro gigabit adapter isn't fiber! It must be mii (simple copper cable). But ethtool shows it as FIBER – TiFFolk Oct 1 '09 at 11:55
Can you tell us exactly which NIC you have? What is the exact product name or pci id? – Shannon Nelson Oct 4 '09 at 20:36
I have removed it from server. But it was Intel Pro 1000/MT PCI. Ethernet controller: Intel Corporation 82541PI Gigabit Ethernet Controller (rev 05). OS: CentOS 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 . If needed, i can install it back. – TiFFolk Oct 5 '09 at 14:03
up vote 0 down vote accepted

You might try posting your question to the e1000 developers mailing list, which is actively monitored by the Intel NIC driver developers. Be sure to include your OS distribution, the output from "ethtool -i eth0", and perhaps the output of lspci.

You can find the mailing list info on the SourceForge site for the Intel NIC drivers:

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When ethtool isn't sure what to say, it just says something. In other words, it lies.

Update your kernel to include the latest drivers for your NIC. Then ethtool will know more, and get it right.

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