Dlink Slow LAN Speeds

I have a Dlink wireless router with two WinXP machines plugged directly
into it via ethernet cable (I dont use the wireless fuctions at all).
Both computers are set at 100Mbps and duplex mode is on 'auto sense'
(and Ive even tried manually setting it to full and half). I have no
firewalls, no anti virus. I have networking knowledge, nothing obvious
is wrong here.

When transfering files from one computer to the other the router is
incredibly slow. It's no where near what it should be, and what other
routers do... For example: a 700 MB movie file will take about 10 min
to transfer from one computer to the other via the Dlink router... but
if I hook up my old Linksys router a 700 MB file takes 1-2 min.

I'm pretty sure its just because this Dlink WBR-1310 model is a
complete piece of crap, but does anyone have suggestions on what I else
I can do to investigate why my LAN speeds are so pathetically slow?

On 14 Nov 2006 15:06:02 -0800, dennispublic@hotmail.com wrote in
<1163545562.733924.121300@h54g2000cwb.googlegroups .com>:

>I have a Dlink wireless router with two WinXP machines plugged directly
>into it via ethernet cable (I dont use the wireless fuctions at all).
>Both computers are set at 100Mbps and duplex mode is on 'auto sense'
>(and Ive even tried manually setting it to full and half). I have no
>firewalls, no anti virus. I have networking knowledge, nothing obvious
>is wrong here.
>
>When transfering files from one computer to the other the router is
>incredibly slow. It's no where near what it should be, and what other
>routers do... For example: a 700 MB movie file will take about 10 min
>to transfer from one computer to the other via the Dlink router... but
>if I hook up my old Linksys router a 700 MB file takes 1-2 min.
>
>I'm pretty sure its just because this Dlink WBR-1310 model is a
>complete piece of crap, but does anyone have suggestions on what I else
>I can do to investigate why my LAN speeds are so pathetically slow?

Why not just replace it with something better?

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

John Navas wrote:

> Why not just replace it with something better?

Because I don't want to spend the money? Because it's new and I
shouldn't have to? Because I may have the same problem with the next
router? Because I'd like to understand the problem rather then just
throw more money at it like you would?

John I remember you from about 2 months ago. It saddens me to see you
still trolling here spewing forth your utterly useless responses which
are purely designed to prop up your fragile ego and advertise yourself.
Stop wasting internet bandwidth & people's time.

Any useful (aka: not from John) suggestions would be appreciated...

dennispublic@hotmail.com hath wroth:

>When transfering files from one computer to the other the router is
>incredibly slow.
(...)
>I'm pretty sure its just because this Dlink WBR-1310 model is a
>complete piece of crap, but does anyone have suggestions on what I else
>I can do to investigate why my LAN speeds are so pathetically slow?

How slow? I can sometimes guess the problem from the numbers.

My guess(tm) is that it's an NWAY negotiation failure at the DLink
WBR-1310. One end or the other is probably doing half duplex, while
the other is doing full duplex. That results in lots of errors and
problem. Another guess is a bad ethernet cable. Despite making all
my own cables and doing it for years, my eyesight is going down the
drain, resulting in creative wiring problems. So, I bought a tester
and found that far too many of my home-made cables are defective. I've
also seen some bogus RJ-45 connectors that don't quite make a
connection in the RJ-45 jacks.

Also, look for mashed gold wire contacts inside the RJ-45 LAN jacks on
the WBR-1310.

The easiest way to troubleshoot this is to replace key parts and see
if it makes a difference. Actually, I would wire an ethernet cross
over cable and replace literally everything. Just a cable between the
two computahs. Check the error rate with:
start -> run -> cmd <enter>
netstat -es
Look for errors and get some benchmark numbers using IPerf:
http://www.noc.ucf.edu/Tools/Iperf/default.htm

If that works, then try an ordinary ethernet switch, juggle cables,
and tinker until the culprit is identified by substitution. It may
also be one of the computahs involved so introducing a 3rd computer
(preferably known working) would be useful.

If it turns out that it's NWAY negotiation failure, you can sorta work
around the problem by setting the speed and protocol of the ethernet
port in the network port advanced properties settings.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On 15 Nov 2006 07:54:02 -0800, dennispublic@hotmail.com wrote in
<1163606042.858371.42340@m73g2000cwd.googlegroups. com>:

>John Navas wrote:
>
>> Why not just replace it with something better?
>
>Because I don't want to spend the money? Because it's new and I
>shouldn't have to? Because I may have the same problem with the next
>router? Because I'd like to understand the problem rather then just
>throw more money at it like you would?

What I actually do is not waste time trying to fix things that don't
have to be fixed, and not waste money buying the cheapest thing I can
find. When I buy a product that doesn't perform properly, I promptly
return it, and get something else. Saves me considerable time and
grief, and money as well.

It's a somewhat different story, of course, when a client is paying me
to fix a particular problem, but even there it often makes more sense
for the client to cut losses and get something else, since that's less
expensive than paying me to troubleshoot the problem, for which there
may well be no good solution other than replacement.

I'll often temporarily replace problematic hardware with my own better
gear, and when clients see how much better it works, they tend to see
the merits in switching rather than fighting. It's a win-win: happier
clients and less grief for me.

But as always, YMMV, so go with whatever floats your boat.

>John I remember you from about 2 months ago. It saddens me to see you
>still trolling here spewing forth your utterly useless responses which
>are purely designed to prop up your fragile ego and advertise yourself.
> Stop wasting internet bandwidth & people's time.
>
>Any useful (aka: not from John) suggestions would be appreciated...

Does acting like a jerk come naturally, or do you have to work at it?
I simply asked an honest question, which didn't warrant that kind of
nastiness.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

On Wed, 15 Nov 2006 09:30:34 -0800, Jeff Liebermann
<jeffl@comix.santa-cruz.ca.us> wrote in
<l1jml25iqfl5c047ii0phqg0tencs8glfo@4ax.com>:

>dennispublic@hotmail.com hath wroth:
>
>>When transfering files from one computer to the other the router is
>>incredibly slow.
>(...)
>>I'm pretty sure its just because this Dlink WBR-1310 model is a
>>complete piece of crap, but does anyone have suggestions on what I else
>>I can do to investigate why my LAN speeds are so pathetically slow?
>
>How slow? I can sometimes guess the problem from the numbers.
>
>My guess(tm) is that it's an NWAY negotiation failure at the DLink
>WBR-1310. One end or the other is probably doing half duplex, while
>the other is doing full duplex. That results in lots of errors and
>problem. Another guess is a bad ethernet cable. ...

The latter is much more likely IMHO. Or mangled connectors. I can't
remember the last time I saw a real negotiation failure.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

John Navas <spamfilter0@navasgroup.com> hath wroth:

>On Wed, 15 Nov 2006 09:30:34 -0800, Jeff Liebermann
><jeffl@comix.santa-cruz.ca.us> wrote in
><l1jml25iqfl5c047ii0phqg0tencs8glfo@4ax.com>:
>
>>dennispublic@hotmail.com hath wroth:
>>
>>>When transfering files from one computer to the other the router is
>>>incredibly slow.
>>(...)
>>>I'm pretty sure its just because this Dlink WBR-1310 model is a
>>>complete piece of crap, but does anyone have suggestions on what I else
>>>I can do to investigate why my LAN speeds are so pathetically slow?
>>
>>How slow? I can sometimes guess the problem from the numbers.
>>
>>My guess(tm) is that it's an NWAY negotiation failure at the DLink
>>WBR-1310. One end or the other is probably doing half duplex, while
>>the other is doing full duplex. That results in lots of errors and
>>problem. Another guess is a bad ethernet cable. ...

>The latter is much more likely IMHO. Or mangled connectors. I can't
>remember the last time I saw a real negotiation failure.

I get NWAY (now called Autonegotiation) failures with 3C905 rev A and
B cards, Netgear FS-108 switches, and some real weirdness on some
cheap gigabit switches and cards that don't seem to conform to Cisco's
interpretation of 802.3u. I suspect they're really counterfeit
hardware. However, you're correct, it's a rare problem that I keep
running into (when I look for it):
http://en.wikipedia.org/wiki/Duplex_mismatch
See discussion on why it screws up at:
http://www.cites.uiuc.edu/network/autosense.html


--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558