Date: Thu, 11 Jul 2013 09:25:57 +0900 From: Yonghyeon PYUN <pyunyh@gmail.com> To: Andreas Longwitz <longwitz@incore.de> Cc: freebsd-net@freebsd.org Subject: Re: sis(4) flow control Message-ID: <20130711002557.GA6697@michelle.cdnetworks.com> In-Reply-To: <51DDDDAB.6070100@incore.de> References: <51DC1599.8040805@incore.de> <20130710023512.GB2753@michelle.cdnetworks.com> <51DDDDAB.6070100@incore.de>
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On Thu, Jul 11, 2013 at 12:18:19AM +0200, Andreas Longwitz wrote: > Yonghyeon PYUN wrote: > > > Hmm, does the change really make flow-control work? > > I believe flow-control should be negotiated with remote link > > partner so you have to announce flow-control capability to link > > partner. In addition, it seems DP83815/DP83816 does not support > > TX flow-control so it just honors RX pause frames. > > Excuse me, the comment in my patch was wrong. Better would be > /* Enable reception of 802.3x pause frames. */. > My soekris boxes are connected to a slow so called "Ethernet Connect" > line (2 Mbit/s). The line works correct and stable if I respect incoming > RX pause frames from the line. I do not need TX flow-control. > > > Try attached patch and let me know how it works. > > Thanks for your patch. I will test it on next update of my soekris boxes > with sis interfaces. Because they are all remote far away this will need > some time. Ok. Make sure to check established link before testing flow-control. 'ifconfig sis0' will show current media and you should have something like the following. ... media: Ethernet autoselect <flowcontrol> (100baseTX <full-duplex,flowcontrol,rxpause,txpause>) If you don't see 'rxpause', re-negotiate flow-control with 'ifconfig sis0 mediaopt flow'.
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