Date: Sat, 6 Nov 2010 15:09:36 -0700 From: Pyun YongHyeon <pyunyh@gmail.com> To: "Mikhail T." <mi+thun@aldan.algebra.com> Cc: net@freebsd.org Subject: Re: Strange problem with sk0 Message-ID: <20101106220936.GE22715@michelle.cdnetworks.com> In-Reply-To: <4CC1FD8D.7000108@aldan.algebra.com> References: <4CC1FD8D.7000108@aldan.algebra.com>
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On Fri, Oct 22, 2010 at 05:09:33PM -0400, Mikhail T. wrote: > Hello! > > I have a rather bizarre problem with my on-board sk interface... It only > works, when tcpdump is running... > > Seriously. It negotiates with the switch (1000baseT/full-duplex) just > fine, but, unless tcpdump has it open (and in "promiscuous" mode), no > traffic seems to go through. It would not respond to pings -- not even > from the switch itself, nothing. > > But, as soon as I start tcpdump -- even if tcpdump never has anything to > output: > > tcpdump -i sk0 -n src host 10.non.existent.IP > > Traffic starts flowing just fine... Do I simply have flaky hardware? The > motherboard is old, and, for some reason, I need to "remind" sk0, what > its ethernet address upon reboote (it starts off with 00:00:00:00:00:00). > > Any other explanations for what is happening? There are plenty of other > systems (computers, VoIP phone, two TVs) on this switch and all are > fine... I did try different ports on it -- same results. I also tried > forcing things down to 100/half-duplex -- no change... > > Thanks! Yours, > FYI: Fix committed to HEAD(r214898, r214899). Will MFC after 1 week.
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