[ed] link state constantly going down and up

[M. Warner Losh]

In message: <261c29700904300029s6757d39ei86fbf69ef816fa48 at mail.gmail.com>
            Miki <miki.bsd at gmail.com> writes:
: 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

OK.  I'll try that.  Do you know if you are able to trigger it with
ttcp too?  That's where I saw the odd symptoms before...

Warner