ethtool - Link detected: no

[Mertens, Bram]

>


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-----Original Message-----
> From: redhat-list-bounces at redhat.com [mailto:redhat-list-
> bounces at redhat.com] On Behalf Of Parvez Shaikh
> Sent: maandag 28 februari 2011 10:31
> To: redhat-list at redhat.com
> Subject: ethtool - Link detected: no
>
> Hi all,
>
> When I run ethtool against ethernet card, I get following output -
>
> [root at datablade1 ~]# ethtool eth3
> Settings for eth3:
>         Supported ports: [ FIBRE ]
>         Supported link modes:   1000baseT/Full
>         Supports auto-negotiation: Yes
>         Advertised link modes:  1000baseT/Full
>         Advertised auto-negotiation: Yes
>         Speed: Unknown!
>         Duplex: Unknown! (255)
>         Port: FIBRE
>         PHYAD: 2
>         Transceiver: internal
>         Auto-negotiation: on
>         Supports Wake-on: g
>         Wake-on: g
> *        Link detected: no*
>
> Note "Link detected: no"; what does it mean?
>
> When I do ethtool -t eth3, I get following output -
>
> [root at datablade1 ~]# ethtool -t eth3
> *The test result is FAIL*
> The test extra info:
> register_test (offline)  0
> memory_test (offline)    0
> loopback_test (offline)  0
> nvram_test (online)      0
> interrupt_test (online)  0
> link_test (online)       1
>
> Note "*The test result is FAIL", *somehow I believe the above two
> outputs
> are interlinked (the test result is FAIL because link detected is
> 'No').
>
> How to fix this to make test result pass and link detected to 'Yes'?
> For
> other ethernet card I can see the test result passing and link detected
> is
> 'Yes'

If I'm not mistaken it means there is no cable connected to that port.

Regards

Bram