Dan Swartzendruber wrote:
> Yeah, I think that's it. I happened to notice a few minutes ago that when I
> ssh to 'nas.druber.com', it is connecting via ipv6 and has the lag. If I
> change the putty entry to 10.0.0.4, it connects instantly. I am wondering
> now if the ssh issue is also ipv6 related? I now have two ssh sessions
> open, one via ipv4 and one via ipv6. I am running wireshark on the ipv4
> only at this point. If the ipv6 one dies, I may retry wireshark on the ipv6
> address...
Actually, that sounds like a completely different problem, unrelated to
name services. That sounds like IPv6 breakage.
Depending on the drivers involved, I remember there being various
hardware checksum offload bugs that can cause all sorts of
strange-looking problems. Some were IPv6-specific.
It might be worthwhile to try rebooting with this in /etc/system:
set ip:dohwcksum=0
and, if you're using e1000g, this in /kernel/drv/e1000g.conf:
tx_hcksum_enable=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
lso_enable=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
I don't trust hardware offload schemes any further than I can throw
them. For a minuscule bump in performance, they extract many hours and
days of wasted administrative effort.
--
James Carlson 42.703N 71.076W <carls...@workingcode.com>
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