James G. Sack (jim) wrote:
Gus Wirth wrote:
James G. Sack (jim) wrote:
[snip]
It was my understanding that GigE automatically adjusted itself so that
crossover cables have no impact, and are never needed.
Empirical testing shows that it works. I directly connected my laptop to
the server with a regular ethernet cable and I can transfer files just
fine. I can also up the MTU on both machines and everything still works
fine. It still doesn't transfer any faster than 100Mb/s ethernet
however. Now it's time to start playing with transmit queue lengths. And
to take the switch back. Bargin price switches don't seem to be worth it.
Well, mtu-1500 _is_ pretty much a hardware standard, isn't it. I would
expect that support for jumbo frames might command a hefty premium
-- awaiting comment from net-hw experts
I found some info at this site:
<http://www.enterprisenetworkingplanet.com/nethub/article.php/3485486>
and tried the suggestions, but nothing seems to help. I did some more
tests including with ttcp and did transfers between my mythtv box,
laptop and server all in various combinations. I got up to 18MB/s file
transfers between the laptop and the mythtv box. It seems that my server
is just slow. My mythtv box is the fastest of the three, it has a
Sempron 2600 on a ECS 755-A2 motherboard and I put in a gigabit ethernet
card with a Realtek 8169 chip.
Gus
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