[ed] link state constantly going down and up

[Miki]

2009/4/30 M. Warner Losh <imp at bsdimp.com>

> In message: <261c29700904300004k4bc02635m2729a0a54c09c135 at mail.gmail.com>
>            Miki <miki.bsd at gmail.com> writes:
> : 2009/4/29 M. Warner Losh <imp at bsdimp.com>
> :
> : > : I have a problem with a D-Link DFE-670TXD which is handled by if_ed :
> : > : the link state is constantly going down and up :
> : > : Apr 28 14:21:33 iut-mir-o kernel: ed0: link state changed to DOWN
> : > : Apr 28 14:21:35 iut-mir-o kernel: ed0: link state changed to UP
> : > ...
> : > : the problem appear with the following commit :
> : > : SVN rev 190643 on 2009-04-02 16:58:45Z by imp (CVS rev 1.126)
> : > : I do not see any link state change if I revert the commit.
> : >
> : > Doh!
> : >
> : > I needed to force auto negotiation for other cards to work.  Let me
> : > see if I can dig up the DFE-670TXD and go from there...  Are you also
> : > seeing really horrible network performance as well?  Do you see this
> : > only under load, or just at idle?
> : >
> : > Warner
> : >
> :
> : Yes network performance suffers from this. The problem only appears under
> : load
> : but not when idle.
>
> Thanks.  I'll try to reproduce it here.  I noticed this on one of the
> cards, but had trouble reproducing it, but I'll try harder.
>
> Warner
>

I can easily reproduce this by downloading an ISO image via ftp
and doing a checkout of a subversion repository
Mikael