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Date: Sun, 21 Oct 2012 11:19:28 +0600
Message-ID: <CAHtHi9m=pd38d7mh5o56EQ3eA+ODZ15ZRe0UQ+Z3yEnEyHayqA@mail.gmail.com>
Subject: Re: kern/171520: [alc] alc network driver + tso + vlan does not work.
From: Nikolay Nevzorov <nevzorovn@gmail.com>
To: Eugene Grosbein <egrosbein@rdtc.ru>
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There is libalias in my kernel config, and i use it on ng0,  not on alc0.
And libalias used not in ipfw - netgraph with it builded by mpd. Anyway
this bug?

2012/10/21 Eugene Grosbein <egrosbein@rdtc.ru>

> 20.10.2012 20:06, Nikolay Nevzorov wrote:
>
> >> Synopsis: [alc] alc network driver + tso + vlan does not work.
>
> It seems you use libalias-based NAT, don't you?
>
> man ipfw says in the BUGS section:
>
>      Due to the architecture of libalias(3), ipfw nat is not compatible
> with
>      the TCP segmentation offloading (TSO).  Thus, to reliably nat your
> net-
>      work traffic, please disable TSO on your NICs using ifconfig(8).
>
> Eugene Grosbein
>