On Tue, Jan 26, 2010 at 11:09:45PM -0800, Nick Rogers wrote: > Can anyone clarify if I should be looking to disable TSO or TXCSUM, or both, > or does disabling either one somehow work around the problem? Thanks a lot. > > On Mon, Jan 25, 2010 at 8:31 PM, Joshua Boyd <[email protected]> wrote: > > > I've been having a similar problem with my network dropping completely on > > my > > 8-STABLE gateway/firewall/fileserver. My setup is a little different, as I > > have re0 and ral0 bridged for LAN, and em0 for WAN. I've just turned off TX > > checksum offloading to see if that makes any difference. > > > > On Mon, Jan 25, 2010 at 1:49 PM, Lars Eggert <[email protected]> > > wrote: > > > > > Hi, > > > > > > On 2010-1-25, at 19:38, Nick Rogers wrote: > > > >> On Mon, Jan 25, 2010 at 10:22 AM, Pyun YongHyeon <[email protected]> > > > wrote: > > > >> I'm not sure you're seeing a checksum offload bug of em(4) but the > > > >> bug is easily reproducible in VLAN environments. If the issue is > > > >> gone when you disable TX checksum offloading, see kern/141843 for > > > >> for more detailed information as well as fix. > > > >> > > > > Good to know, but I am having a similar problem on another em(4) > > > interface that has no VLAN interfaces. > > > > > > FYI, I also have these issues without using VLANs, and turning off TSO > > > fixed them.
The recommendation is to disable TSO (TCP Segmentation Offloading) as well as TXCSUM (TCP Checksum Offloading). -- | Jeremy Chadwick [email protected] | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB | _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[email protected]"
