Date: Mon, 22 Oct 2012 13:38:04 -0700 From: YongHyeon PYUN <pyunyh@gmail.com> To: Nikolay Nevzorov <nevzorovn@gmail.com> Cc: freebsd-net@freebsd.org, Eugene Grosbein <egrosbein@rdtc.ru>, yongari@freebsd.org Subject: Re: kern/171520: [alc] alc network driver + tso + vlan does not work. Message-ID: <20121022203804.GA1523@michelle.cdnetworks.com> In-Reply-To: <CAHtHi9nihqbN2ScYmtERPO3AOMxSdsi9EtwXsWN4kZSgAiP5Eg@mail.gmail.com> References: <201210180141.q9I1f53s052539@freefall.freebsd.org> <CAHtHi9kphRZnX53mKeWzG3HcJoq8-E1Cb1JJTQsrybqLwPGk1g@mail.gmail.com> <50830F8B.4030204@rdtc.ru> <CAHtHi9m=pd38d7mh5o56EQ3eA%2BODZ15ZRe0UQ%2BZ3yEnEyHayqA@mail.gmail.com> <5083D79C.4010309@rdtc.ru> <CAHtHi9nHpNJV8tm6NmjCRYVwH5JKqAGKDy0fo-Cb5hWSx6NfSw@mail.gmail.com> <5084C51E.7080300@rdtc.ru> <CAHtHi9nihqbN2ScYmtERPO3AOMxSdsi9EtwXsWN4kZSgAiP5Eg@mail.gmail.com>
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On Mon, Oct 22, 2012 at 10:15:28AM +0600, Nikolay Nevzorov wrote: > 2012/10/22 Eugene Grosbein <egrosbein@rdtc.ru> > > > 22.10.2012 10:55, Nikolay Nevzorov пишет: > > > I can make clean test. > > > > > > What do you mean by clean: > > > reboot with disable mpd (and so will be not enabled kernel NAT in > > system) or remove LIBALIAS from kernel too? > > > > You need not reboot or disable mpd. Just make sure your testing traffic > > does not pass through NAT. > > > > > > Any traffic throuhg NAT does not cause problems. And any routed traffic so > on. > > Problem only with traffic that generated on host with alc0, because host > generate packets much more bigger than MTU (about 2300 bytes per packet > with MTU 1500), a see it with tcpdump on alc0. It's completely normal to see bigger MTU sized packets on TSO-capable controllers. bpf sees these packets *before* hardware actually segments these packets.
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