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Help with a LAN issue - Slower on hard wire


Scott

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I'm a bit stumped by this one.

 

I've got a mainly wired network in the house. My main server/PC is connected directly to the router with various other devices connected through a switch. The laptops of the house, and a few other devices, connect wirelessly through a dual band option.

 

If I run speedtest on my server/PC I get fairly pitiful results by comparison to what I should be seeing (100mb/s). If I run speedtest on my laptop I see an easy 70mb/s, and that's not even on the 5ghz band.

 

Something is slowing down my PC and I can't put a finger on what it is. All firewalls are disabled, I allow the router to take care of that, and I've gone through most obvious things that I can think of. It's definitely not an internet bandwidth issue, as I tested the laptop and the PC back to back..... so it's not as if the PC is using a lot of WAN bandwidth at the time I am running the test.

 

If I reboot the PC I get no change, results stay constant.

If I power off the Router, restart it then try I get everything running full speed.

 

It seems very strange that the router is struggling more with the LAN than it is the wireless. Any pointers on what I can look at to resolve this? Is it potentially a heat issue? The router is on 24/7, other than the periodic reboot to try and get the speed up again. What worries me is that I'm limiting my actual network speed with this router, if I can't even max out my modem then there's no way I'll be getting close to my LAN capability.

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Doing some further investigation I've checked the LAN at the switch and found it to be 9mb/s. Is that normal for a Gigabit switch? I'm wondering if there is some dodgy duplex settings somewhere, unfortunately I can't set everything manually as I have non-configurable stuff connected.

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Have you tried plugging the laptop in to the regular LAN ports to try and isolate if it's the router or the PC?

 

A friend had this problem turned out his kids were watching films. streaming, and various other thingd using devices sucking up all his bandwith.

 

As for thw switch i would at least want to see 100mbs. Have you got another switch to test?

 

 

I wanted to test the switch first so I turned everything off, hooked up the laptop and started testing. I had to tweak the settings on the laptop LAN to get it to work but once it did, it was blistering.

 

image

 

It flew up to that rate too so there is definitely no issue between the switch and the network.

 

I'm still not seeing the speeds I should through the PC though so I'll need to investigate it further. I just tried changing the cable over but it made no difference.

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It's not a LAN issue, it's a WAN issue. At least I'm starting to rule stuff out.

 

Just tried a file transfer from my PC (hardwired) to my Laptop (Wireless) and saw 16MB/s which is about as good as I would expect.

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Go to your network adapter settings, click status and see what speed your adapter is running at.

 

If it isn't running at 1 Gbps then go to the adapter's properties and see if you can find the setting that tells the network adapter what speed to run at.

 

When I had a similar issue in the past, turns out I was using the incorrect type of ethernet cable, as it wasn't rated for gigabyte speeds and was bottle necking my whole network.

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Dodgy cable to the PC? Dodgy network card in the PC?

 

Swapped the cable over but it didn't make a difference. I'm thinking of buying another network card just to try it as this one is built onto the motherboard (P8Z77-V).

 

Go to your network adapter settings, click status and see what speed your adapter is running at.

 

If it isn't running at 1 Gbps then go to the adapter's properties and see if you can find the setting that tells the network adapter what speed to run at.

 

When I had a similar issue in the past, turns out I was using the incorrect type of ethernet cable, as it wasn't rated for gigabyte speeds and was bottle necking my whole network.

 

I did check all that but it's not really making any difference. I don't think there is any hardware issue, I think it's definitely a configuration issue. As I said previously I'm seeing network speeds up to 20MB/s (160Mb/s) through file transfer to my wireless laptop so there is no throughput issue.

 

As I understand it, this can only be a router issue rather than the PC or other hardware. I've browsed around and there are similar issues using this router. The strange thing is that I'll get full speed sometimes and not others. I've messed around with loads of settings and the speed is massively increased from where it was, it's still not full steam ahead though (70+Mb/s vs 100Mb/s connection).

 

I'll keep messing around with it though, I did check for a firmware update but there wasn't one available (Merlin may be an option if I don't get any luck soon).

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Something that I've just realise that muddies the waters slightly. When I was connected through the switch earlier I was seeing full speed.

 

Hmm, definitely think I'll get an adapter card just to rule it out.

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I'm still having issues with this. I've taken the router out of the equation, I unplugged everything other than the PC itself from the modem/hub and it's still the same. From that I've ordered up a new NIC.

 

If this doesn't clear up the issue then it'll be a reformat and a test after each software install to nail this down.

 

Incidentally I've been having an issue with the PC booting up since upgrading my HDDs. I currently have a 550w PSU, Thermaltake so not cheap and nasty. I've got 1 SSD drive, 4 SATA HDDs and 1 SATA DVD/RW. I don't have any GFX card or anything OTT, I've got a couple of decent fans but that's it. Sometimes it hangs on the post, I took it that the PSU wasn't enough to boot that little lot but having thought it over I'm surprised as I didn't think the drives would use much power at all. Sometimes it boots, sometimes it doesn't. Cue a 750w modular PSU being ordered from dabs.

 

Between the PSU, some new SATA cables and the NIC card, if that doesn't fix it...... I'm beat :D

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hey scott might sound daft but have you tried seeing whats running in your task manager as if somethings there that probably shouldn't be in your process tree if you dont know how to do this press ctrl alt delete together then start task manager and go into processes look for some anomaly's also as you just stated for your PSU your 550W Thermaltake would be oceans for your setup i have the corsair 550W running 2 high end GPU's n 4 SATA's HDD'S ( havent gone over to SSD yet ) with 16 GIG ram and its plenty if its a big brand like these you can be sure its just as good as a cheap every day 850W PSU , anyways goodluck finding the problem i have had this problem before with trojans on my computer leaching did a full format and sorted the problem

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Hi mate, I'm not 100% certain that it's not a process running but I'm 99.9% sure it isn't. I installed the SSD drive a couple of weeks ago and it was a clean install with only a few select installs added. One is AV and another is a torrent app so those will be the first ones getting crossed off the list (firewall is deactivated though, both windows and the AV one). Anyway, I'm pretty sure it's not a process as if I use the Wifi on the PC it almost maxes out the speed test. It's only hardwired that's causing any issues.

 

Also, I ran the system with MSConfig on it's minimum to give me network access. Same thing happened.

 

I'm almost positive that it's hardware related but I'll find out for certain once the card has arrived and the port is disabled at BIOS level.

 

Cheers

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Current configuration:

 

Laptop hard wired into 1GB switch.

1GB switch hard wired into Virgin Superhub

Desktop PC hard wired into Virgin Superhub

 

 

Lan test. Certainly not slow. By my reading I've maxed out the line speed (1GB). This is between my laptop and my desktop with the hardline connected to both:

 

attachment.php?attachmentid=201327&stc=1&d=1431818033

 

 

Laptop speed test with exactly the same configuration (no changes made at all)

 

image

 

 

Desktop speed test, as above. Exactly the same config.

 

image

 

 

It appears that it's only the download speed that's impacted. I'm not sure whether it's port 8080 only though. I was going to try using my firewall to re-route port 8080 to another port but I wasn't sure if I would actually achieve anything by doing so.

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Have you investigated the ASUS P8Z77-V network icontrol feature ? http://www.asus.com/Motherboards/P8Z77V_DELUXE/ just read on the page in link (halfway down on RHS) that your bandwidth can be prioritised for games/movies etc

 

I installed it a while back but I haven't installed it again since the reformat.

 

Strangely I'm hitting full speed today with absolutely no changes to anything. I hate gremlins like this :(

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Did you have your network card set to auto-negotiate? Some times, you see this on Realtek cards where its meant to give full speed auto negotiation. But you'll get something like 10Mbit Full Duplex or 100Mbit Half Duplex. I run Intel NIC's for that very reason.

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Did you have your network card set to auto-negotiate? Some times, you see this on Realtek cards where its meant to give full speed auto negotiation. But you'll get something like 10Mbit Full Duplex or 100Mbit Half Duplex. I run Intel NIC's for that very reason.

 

I did check that, it always states 1Gbit. Also, it runs 1gb on wired transfers. It's literally just internet downloads.

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  • 3 months later...

Not sure what the issue was with the internet, it kinda cleared itself up. Unsurprising as I stripped everything, chucked in new parts, did loads of various bits & bobs and basically swore at it.

 

The boot issue is a curious one though. I finally managed to sort it out after a LOT of head scratching. I can't pinpoint exactly what the issue was, as it wasn't my issue, but a BIOS upgrade completely cured the issue. It seems to be some sort of fault with posting an SSD as the boot device, it would just freeze. Anyway, a long time after I should have tried it, I eventually upgraded the BIOS and it completely sorted the issue.

 

All good in the hood now :)

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