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Date:   Thu, 19 May 2022 12:54:09 -0500
From:   Tom Lendacky <thomas.lendacky@....com>
To:     "Pighin, Anthony (Nokia - CA/Ottawa)" <anthony.pighin@...ia.com>,
        "S-k, Shyam-sundar" <Shyam-sundar.S-k@....com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: PROBLEM: XGBE unable to autoneg when advertising only 1GbE KX
 mode

On 5/19/22 09:28, Pighin, Anthony (Nokia - CA/Ottawa) wrote:
> Additional information:

Adding Shyam.

Tom

> 
> I performed an asymmetric test. One side has 'ethtool -s bp3 advertise 0x20000' and the other side of the link has 'ethtool -s bp3 advertise 0xa0000' (ie. one side is advertising 1G only, the other is advertising 1G+10G). If I bring up the 1G-only side first, followed by the 1G+10G side, then the link properly comes up at 1G. However, if I do the reverse, and bring up the 1G+10G side first, followed by the 1G-only side, there is no link up. I need to bounce the 1G+10G side again (ip set link bp3 down/up) to get the link to come up.
> 

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