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Gigabit lan only transferring @ ~10mbps

post #1 of 19
Thread Starter 
Trying to install a gigabit backbone into my house to share files between the 6 or so computer we have. Testing out the functionality by just laying the cables on the ground and connecting them up. I'm only getting about 10mb/s from computer to computer.

I'm using:

19M Cat 5e cables
and
1metre cat5e cables
with
tp link TL-SG1008d 8-port gigabit switch.


My test machines are:

Desktop:
- Broadcom Gigabit ethernet drivers with speed & duplex set to "Auto"

Laptop - hp pavillion g6
-realtek ethernet drivers with speed & duplex set to "Auto"

desktop
-realtek family controller #2 with speed & duplex set to "auto negotiate"


I've tired everything I can think of to try and get speeds of ever 100mp/s, but so far my peak was about 12mbps. No idea why it doesn't / can't go any higher.

Please help.
post #2 of 19
If you right click the network connection and view 'status', what kind of link speed do you get? You can also verify by the lights on the switch.

It really just sounds like one segment of the link is sync'd at 100 mbit.

If you're terminating your own cables, sometimes you may need to re-terminate depending on how tightly you were able to keep the twists into the crimped connector.
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post #3 of 19
what bios you using, I have seen this issue

there is a hidden feature in the bios that deals with auto neg , and I know it was unlocked for my board with the latest beta bios. I saw someone on here who had a similar issue and was able to resolve it by changing that setting.

Mod edit: Please use the edit button instead of double posting.
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post #4 of 19
set the nics to gigabit
auto often has problems
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post #5 of 19
Quote:
Originally Posted by mikehunt View Post

set the nics to gigabit
auto often has problems

Usually there is a reason a NIC will negotiate lower than gigabit.
If you force the link at 1 Gbps and the cabling isn't able to carry that amount of data, you'll just kill your link until you turn it back down..
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post #6 of 19
Just FYI

Gigabit Ethernet requires all four pairs (8 wires) to be connected in the RJ-45s, whereas 10 Base-T and 100 Base-TX will run with just 4 wires. If you punched your own house wiring and/or patch cables, make sure you did it right with all 4 pairs and be sure to maintain the twists all the way up to the punch downs. If you untwist it even 1/2" it won't maintain the gigabit signal will degrade.

Greg
post #7 of 19
Thread Starter 
Okay, thanks for the quick replys, here goes:
Quote:
Originally Posted by beers View Post

If you right click the network connection and view 'status', what kind of link speed do you get? You can also verify by the lights on the switch.

It really just sounds like one segment of the link is sync'd at 100 mbit.

If you're terminating your own cables, sometimes you may need to re-terminate depending on how tightly you were able to keep the twists into the crimped connector.

It's saying 100mp/s not the full 1gb/s im looking for at the moment. Not too sure why that is.

Quote:
Originally Posted by hammong View Post

Just FYI

Gigabit Ethernet requires all four pairs (8 wires) to be connected in the RJ-45s, whereas 10 Base-T and 100 Base-TX will run with just 4 wires. If you punched your own house wiring and/or patch cables, make sure you did it right with all 4 pairs and be sure to maintain the twists all the way up to the punch downs. If you untwist it even 1/2" it won't maintain the gigabit signal will degrade.

Greg

I bought the wires pre-crimped off ebay, haven't put them into the walls yet so I could tick off that it's not a nicked wire by me.

Quote:
Originally Posted by Jedson3614 View Post

what bios you using, I have seen this issue

Bios version: 04.06.05 on the main computer I'm using

bios version: pheonix - awardbiosv6 on the main computer for files.
Quote:
Originally Posted by mikehunt View Post

set the nics to gigabit
auto often has problems

The nics doesn't go upto gigabit - goes upto 100mbs full or half. like this: http://www.qdpma.com/Storage_files/BroadcomGbE.png
post #8 of 19
Quote:
Originally Posted by jamesev93 View Post

Okay, thanks for the quick replys, here goes:

The nics doesn't go upto gigabit - goes upto 100mbs full or half. like this: http://www.qdpma.com/Storage_files/BroadcomGbE.png

link dosent work, but if you dont have gigabit nics then you wont see gigabit speeds simply put. Everything has to match (nics, switchs, routers... etc) if you have a 100mb nic a gigabit router your still only going to get 100mb
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post #9 of 19
Thread Starter 
Quote:
Originally Posted by burksdb View Post

link dosent work, but if you dont have gigabit nics then you wont see gigabit speeds simply put. Everything has to match (nics, switchs, routers... etc) if you have a 100mb nic a gigabit router your still only going to get 100mb

Yeah that's what I was thinking however, http://sqlblog.com/blogs/joe_chang/archive/2010/03/23/gigabit-and-full-duplex.aspx website says that: "Below is a diagram from the Broadcom 1GbE. The 10 and 100Mbit/s modes allow a choice of half or full duplex. The 1GbE mode is auto-detect and will negogiate full-duplex if supported." Which is the diagram I linked, my ethernet card is broadcom gigabit card. Sounds like you have to put on auto to get 1gb/s

Still doesn't really state why im only getting 10mbps too?

Even if it was only 100mbps for some lines, I wouldn't mind too much.
Edited by jamesev93 - 6/9/13 at 2:29am
post #10 of 19
What do you mean with 10mbps and where do you read it?
Approximate speed comparison between bits/sec and bytes/sec:
1 GBit/sec -> 100 MBytes/sec
100 MBit/sec -> 10 MBytes/sec
10 MBit/sec -> 1 MBytes/sec
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