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Problem with gigabyte lan

Author
15 Jan 2009 8:44 PM
k0103707
I've got two pc's both support gigabyte lan. Use one as my main pc and one to
backup to etc. The lan speed is nothing like i was hoping. It works stable at
around 5% of it's full capacity... I'm not sure what the problem is. Both are
setup for giga speeds, the router supports giga speeds and the switch also
supports giga speeds. I've tried different configurations and it's the same
with all of them. Are there any known problems? What could be causing this?

Router: dlink dir 655
Switch: netgear gs108t
windows xp

Motherboards
dell xps 400
foxconn 945g7md-8ekrs2h


--
Man oh man!

Author
15 Jan 2009 9:56 PM
John Wunderlich
=?Utf-8?B?azAxMDM3MDc=?= <k01***@yahoo.co.uk> wrote in
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news:10D607D7-5DDB-4ED5-9859-FC4DB9C03933@microsoft.com:

> I've got two pc's both support gigabyte lan. Use one as my main pc
> and one to backup to etc. The lan speed is nothing like i was
> hoping. It works stable at around 5% of it's full capacity... I'm
> not sure what the problem is. Both are setup for giga speeds, the
> router supports giga speeds and the switch also supports giga
> speeds. I've tried different configurations and it's the same with
> all of them. Are there any known problems? What could be causing
> this?
>
> Router: dlink dir 655
> Switch: netgear gs108t
> windows xp
>
> Motherboards
> dell xps 400
> foxconn 945g7md-8ekrs2h
>
>

I looked up the Netgear GS108T and found that it is a GigaBIT switch
and not a GigaBYTE switch, so you have to decrease your expectations by
a factor of 10 or so right there.  :-)

Do you have the correct cables?  100-Base-T only requires only two
pairs (4 wires) in the cable. Many [cheap] cables have been made with
only 2 pair to save money when only 100-Base-T was used.  Gigabit
requires all 4 pairs of wires.  If you use the wrong cable, your speed
will automatically drop back to 100-Base-T.  Accept nothing less that a
Cat 6 cable for Gigabit Ethernet.  If you terminate your own wires, pay
particular attention that the correct color/stripe wire is in the
correct pin. Mis-pairing wires is disasterous and hard to find. 

Open your Network Connections Control Panel and double-click on your
network and see if it has connected at the correct speed.

Assuming both computers are connecting at 1000-Base-T speeds, how are
you transferring files?  Microsoft Networking is quite a bit slower
than FTP, for example, and with Microsoft Networking speed is different
if you are pushing the data vs pulling the data.

I once connected two 1000-Base-T computers together with only a Cat 6
cross-cable and using Microsoft Networking I was able to get a payload
peak of about 20-25 MBytes/Sec when transferring large-size files. 
I've always used that number as a yardstick since.  If you're
transferring a lot of small files, you'll probably find that the time
it takes the computers to create the file in the directory structure on
the destination computer is much more than the time to transfer the
data and slows down the transfer significantly.  If you have a lot of
small files, zip them all into a big .zip file and transfer that to
increase efficiency.

HTH,
  John
Author
15 Jan 2009 11:18 PM
k0103707
I see! It's connecting at the right speed. There doesn't seem to be a
difference between sending loads of different files to sending a single file.
Only one of the cables is a cat6 cable the others are cat5 cables. So this
will probably cause the problem?

Thank you for your clear & thorough answer mate!
--
Man oh man!


Show quoteHide quote
"John Wunderlich" wrote:

> =?Utf-8?B?azAxMDM3MDc=?= <k01***@yahoo.co.uk> wrote in
> news:10D607D7-5DDB-4ED5-9859-FC4DB9C03933@microsoft.com:
>
> > I've got two pc's both support gigabyte lan. Use one as my main pc
> > and one to backup to etc. The lan speed is nothing like i was
> > hoping. It works stable at around 5% of it's full capacity... I'm
> > not sure what the problem is. Both are setup for giga speeds, the
> > router supports giga speeds and the switch also supports giga
> > speeds. I've tried different configurations and it's the same with
> > all of them. Are there any known problems? What could be causing
> > this?
> >
> > Router: dlink dir 655
> > Switch: netgear gs108t
> > windows xp
> >
> > Motherboards
> > dell xps 400
> > foxconn 945g7md-8ekrs2h
> >
> >
>
> I looked up the Netgear GS108T and found that it is a GigaBIT switch
> and not a GigaBYTE switch, so you have to decrease your expectations by
> a factor of 10 or so right there.  :-)
>
> Do you have the correct cables?  100-Base-T only requires only two
> pairs (4 wires) in the cable. Many [cheap] cables have been made with
> only 2 pair to save money when only 100-Base-T was used.  Gigabit
> requires all 4 pairs of wires.  If you use the wrong cable, your speed
> will automatically drop back to 100-Base-T.  Accept nothing less that a
> Cat 6 cable for Gigabit Ethernet.  If you terminate your own wires, pay
> particular attention that the correct color/stripe wire is in the
> correct pin. Mis-pairing wires is disasterous and hard to find. 
>
> Open your Network Connections Control Panel and double-click on your
> network and see if it has connected at the correct speed.
>
> Assuming both computers are connecting at 1000-Base-T speeds, how are
> you transferring files?  Microsoft Networking is quite a bit slower
> than FTP, for example, and with Microsoft Networking speed is different
> if you are pushing the data vs pulling the data.
>
> I once connected two 1000-Base-T computers together with only a Cat 6
> cross-cable and using Microsoft Networking I was able to get a payload
> peak of about 20-25 MBytes/Sec when transferring large-size files. 
> I've always used that number as a yardstick since.  If you're
> transferring a lot of small files, you'll probably find that the time
> it takes the computers to create the file in the directory structure on
> the destination computer is much more than the time to transfer the
> data and slows down the transfer significantly.  If you have a lot of
> small files, zip them all into a big .zip file and transfer that to
> increase efficiency.
>
> HTH,
>   John
>
Author
21 Jan 2009 6:33 AM
John Wunderlich
=?Utf-8?B?azAxMDM3MDc=?= <k01***@yahoo.co.uk> wrote in
news:41A329AB-0DBA-4C87-950D-96ABACE5F3A5@microsoft.com:

> I see! It's connecting at the right speed. There doesn't seem to
> be a difference between sending loads of different files to
> sending a single file. Only one of the cables is a cat6 cable the
> others are cat5 cables. So this will probably cause the problem?
>
>

Maybe, maybe not.  Cat 5 and cat 5e cables are "almost" as good as Cat
6 and will probably work as well particularly if the lengths are fairly
short.  Connecting at the right speed would indicate that all necessary
pairs of wires are present.

HTH,
  John