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  A whopping 1MB/s on a 100BaseT connection. 
 
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Nathan Daniels Apr 22, 2010, 12:32pm EDT Report Abuse
This is ticking me off. My desktop and laptop (specs in bio) are both connected to a Linksys 10/100 switch with two Cat5e UTP cables (one each). I try to copy a single 8GB file from the desktop to the laptop. However, the transfer rate never exceeds ~1.5MB/s and usually stays around 750KB/s. Sometimes it even stops all together for a few seconds before crawling back up to speed. The NIC of the desktop is rated up to 1000BaseT and the Laptop's NIC is good for 100BaseT. So I can't see any bottlenecks other than the operating systems, both of which are Windows 7 which I believe is good enough for at least 100Mb/s. So what's going here? I am in the process of getting Network+ certified but so far nothing I have learned has helped.


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"The more we sweat in peace, the less we bleed in war."
-Patton
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PIRATE Apr 22, 2010, 04:59pm EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
I use Flash FXP program to transfer games from my PC to my regular XBOX.

These are whole DVDs and the transfer speed is always around 10 mbps unless I try to upload too many things at once.


Give it a try or it might just be your network card settings (Like Full Duplex, etc.)


Sorry, noob when it comes to networking. :P

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Intel Core 2 6400 2.1ghz / ASUS SLI Deluxe / 4gb DDR2 800 G.Skill / ATi Radeon HD 3870 512mb OC / 7 years old Seagate Barracuda 160gb 7200
Meats_Of_Evil Apr 22, 2010, 05:54pm EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
The only thing that comes to mind is the hard drives that are crippling the transfer speed, which is no surprise really since hard drive haven't evolves as much as cpus and gpus over the years.

Are you sure you can go higher than those speeds without raid or SSD's?



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Everything I write is Sarcasm.
Bungle Apr 22, 2010, 06:10pm EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
The hard drives are capible of much more than 1MB/s

You're proabably losing a lot of bandwidth to the TCP/IP protocol which is burdened with a bunch of overhead. Theoretical max data transfer is only 100Mbps which is only 12.5MB/s.

Core i7 4770K @ 4.4GHz | Corsair H110 | Gigabyte GA-Z87X-UD5H | 32GB 1866MHz Corsair Vengeance
2x EVGA GTX 780 SLI | 256GB OCZ Vector SSD | 4TB Hitachi 7K4000
Corsair AX1200 PSU | Corsair 650D | Windows 7 Ultimate x64
Shawn Langley Apr 23, 2010, 03:55am EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
How long are the patch cables? Shielded or just plain? Cables old and damaged at all? Criss Crossing over power lines ect? (I'm heading for some major interference here)

Also what happens if you try straight Laptop>Desktop connection and bypass the switch altogether? (I'm going to guess they both have auto sensing mdi-x so you don't have to faff around with crossovers)

Also I used this
http://download.cnet.com/LAN-Speed-Test/3000-2085_4-10908738.html
Once to measure network bandwidth, fairly simple but might be worth a shot to see what it gives you.

Having voices in your head is normal. Listening to them, common. Arguing, acceptable. However, when you lose the argument, you're in trouble.
Nathan Daniels Apr 23, 2010, 10:30am EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
Shawn Langley said:
How long are the patch cables? Shielded or just plain? Cables old and damaged at all? Criss Crossing over power lines ect? (I'm heading for some major interference here)

Also what happens if you try straight Laptop>Desktop connection and bypass the switch altogether? (I'm going to guess they both have auto sensing mdi-x so you don't have to faff around with crossovers)

Also I used this
http://download.cnet.com/LAN-Speed-Test/3000-2085_4-10908738.html
Once to measure network bandwidth, fairly simple but might be worth a shot to see what it gives you.


Alright I connected the laptop directly to the desktop (which I didn't know you could do without a crossover cable) and, miraculously, it works great. I get a good 12 MB/s transfer rate which Mr.Bungle said is about the best 100Mb/s can handle with TCP/IP. I eliminated the idea that there is interference between the desktop and the switch and the idea that wither cable is damaged by trying both cables and running the cable connecting the two computers across the same exact path the one connecting the desktop to the switch runs.

So this means it must be the switch, which is unfortunate because it is not only a switch but also a wireless router running third-party firmware to allow it to act as a wireless bridge.

Another odd thing is if I connect the desktop via a cable and the laptop wirelessly, I get about 3MB/s; more than if the laptop were wired to the same exact device!

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"The more we sweat in peace, the less we bleed in war."
-Patton
Beavis Khan Apr 23, 2010, 10:39am EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
Nathan Daniels said:
Alright I connected the laptop directly to the desktop (which I didn't know you could do without a crossover cable)


Most modern NICs will auto-sense the type of cable connected and do the crossover for you in firmware. I sure don't miss having to worry about crossovers.

Are there any other wired devices on your switch? Lots of consumer grade switches will only operate at the speed of the slowest connected device. So, if you've got a 10BaseT device connected, all your ports will now operate at that speed. 1MB/sec is suspiciously close to the typical 10BaseT transfer rate...you ought to be able to get the status of your network connection in Windows and see what the speed is:

http://img693.imageshack.us/img693/1299/networkconnection.png

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"For every complex problem, there is a solution that is simple, neat, and wrong."

- H.L. Mencken
Shawn Langley Apr 23, 2010, 01:42pm EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
What model number of router do you have? and which 3rd party firmware+revision are you using?

I'd suggest if its not too much hastle to flash back to stock and retest, I'm willing to guess your 3rd party firmware is what is causing problems might be worth trying other revisions or googling to see if is causing other people similar throughput problems.

Also since it only affect when moving from Ethernet>Ethernet rather than Ethernet>Wireless could it be something to do with packet collisions due to high traffic rate? (although its not a hub so it shouldnt affect it, but maybe this 3rd party firmware is changing how the router operates / forwards packets?)

Having voices in your head is normal. Listening to them, common. Arguing, acceptable. However, when you lose the argument, you're in trouble.
BoT Apr 25, 2010, 06:32pm EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
i also suspect the 3rd party firmware.
it might not be optimized for your router.

you could also try to ping the router and the lappy to see if there is latency on the connections.

use wireshark to see if there is any other traffic going on like multicast or broadcast

You can either be part of the problem or be part of the solution.
Codisha - http://www.codisha.com
Reviews - http://www.codisha.com/reviews/reviews.htm
G. G. Apr 25, 2010, 07:52pm EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
This kinda sounds like an excuse for a new router upgrade......

Netgear WNDR-3700 is the ticket.

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Nathan Daniels Apr 25, 2010, 08:44pm EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
Are there any other wired devices on your switch? Lots of consumer grade switches will only operate at the speed of the slowest connected device. So, if you've got a 10BaseT device connected, all your ports will now operate at that speed. 1MB/sec is suspiciously close to the typical 10BaseT transfer rate...you ought to be able to get the status of your network connection in Windows and see what the speed is:


Both read 100 Mb/s. I unplugged the only thing that could possibly be 10Mb/s (my Wii) and got no improvement.

What model number of router do you have? and which 3rd party firmware+revision are you using?


The famous Linksys WRT54G v4 with DD-WRTv24 running on it. The firmware turns the normal wireless AP into a wireless bridge. Thus, I need this firmware running on it to allow my desktop, Wii, and 360 to connect to the internet. So I really don't want to re-flash the whole thing and see if that helps. If the firmware really is the cause, I will just live with the slow UTP connection speed.

This kinda sounds like an excuse for a new router upgrade.....


Or a simple wired switch and 100 foot cable running through my attic...

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"The more we sweat in peace, the less we bleed in war."
-Patton
G. G. Apr 26, 2010, 12:34am EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
Nathan Daniels said:

This kinda sounds like an excuse for a new router upgrade.....


Or a simple wired switch and 100 foot cable running through my attic...



Yeah........ but you are spending some money there and will get all the nasty fiberglass crap all over you when you run that cable. Plus, the amount that you spend on that simple switch and 100' cable..... you probably sunk 1/4~1/3 of a price of a netgear wndr3700. And you'll have more fun in setting up a new wireless router... :P

So far, I have 3 x wirelss computer, wireless printer, 2 X wired computer, wired print spooler with two printers attached, and a Wii. All works great with no isue. Heck.... I can watch Net Flix on the Wii and load up the router with the wireless computers and a wired computer and have no issue with streaming movies to the Wii...


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BoT Apr 26, 2010, 01:29am EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
So far, I have 3 x wirelss computer, wireless printer, 2 X wired computer, wired print spooler with two printers attached, and a Wii. All works great with no isue. Heck.... I can watch Net Flix on the Wii and load up the router with the wireless computers and a wired computer and have no issue with streaming movies to the Wii...


thats WNDR3700 goodness for ya =)

question about the bridge mode thou. what do you need it for .. the 360?

You can either be part of the problem or be part of the solution.
Codisha - http://www.codisha.com
Reviews - http://www.codisha.com/reviews/reviews.htm
Nathan Daniels Apr 26, 2010, 09:19am EDT Report Abuse
>> Re: A whopping 1MB/s on a 100BaseT connection.
BoT said:

question about the bridge mode thou. what do you need it for .. the 360?


I was not going to spend $100 for the MS issued wireless adapter when I already had an old router-turned-bridge laying around. I used the same logic when I built my computer; there is no wireless adapter card in it as it sits right below the bridge.

I already have a normal wireless router elsewhere in my house. It's a $20 Trendnet which doesn't have any alternative firmware available so it is the one connected to the modem and acts like a normal router. What I need is possibly a new, real, bridge.

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"The more we sweat in peace, the less we bleed in war."
-Patton


 

    
 
 

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