sk98lin: 2 Pair Downshift detected

sk98lin: 2 Pair Downshift detected

[Tony Chung]

Hi,

I got the following message:

        Class:  Hardware failure
        Nr:  0x270
        Msg:  2 Pair Downshift detected

It is from the sk98lin driver and my research indicated that it may be
caused by bad Ethernet cable.  The gigabit port is now became 100Mbps.

My questions are:
1. What is 0x270 mean? Is there any link or reference for it?
2. How do you recover from it (i.e. negotiate back to 1000Mbps)?
Reboot? Reload the driver?  Can the driver do it automatically?


Thanks.
- Tony

Re: sk98lin: 2 Pair Downshift detected

[Stephen Hemminger]

On Thu, 15 Feb 2007 12:49:26 -0800
"Tony Chung" <tchung@appliedidentity.com> wrote:

> Hi,
> 
> I got the following message:
> 
>         Class:  Hardware failure
>         Nr:  0x270
>         Msg:  2 Pair Downshift detected
> 
> It is from the sk98lin driver and my research indicated that it may be
> caused by bad Ethernet cable.  The gigabit port is now became 100Mbps.
> 
> My questions are:
> 1. What is 0x270 mean? Is there any link or reference for it?

It is a error code used inside driver. It looks like a bad job of internationalization
so every message is encoded as a number, then printed out.


> 2. How do you recover from it (i.e. negotiate back to 1000Mbps)?
> Reboot? Reload the driver?  Can the driver do it automatically?

Use 'ethtool -r eth0' to force PHY renegotiation or bring device
down then back up.

> 
> Thanks.
> - Tony
> -
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-- 
Stephen Hemminger <shemminger@linux-foundation.org>