Unable to connect to or keep 100mbps full duplex connection via ethernet

idean201

Commendable
Sep 9, 2016
2
0
1,510
Hi guys, I've been having difficulty for months now with my Ethernet connection. The problem is that whenever I try to auto-negotiate speeds, my speed defaults to a 10mbps full duplex connection. This is simply not fast enough, so I manually change the link speed to a 100mbps full duplex connection, which causes the connection to no longer work, and Windows identifying the problem as a "network cable is unplugged." The only three "solutions" I have found around this are:

1. Reverting back to the totally sluggish 10mbps full duplex connection
2. Downgrading to a 100mbps HALF duplex connection, which is still significantly slower (40%) and who likes half duplexes anyway?
3. Enabling Legacy Switch Compatibility Mode, which brings my speed down to about 40% of what it should be, but is still 4x faster than 10mbps.


Now, sometimes I am able to use the Legacy Switch Compatibility and get a fine 40mbps connection on a 100mbps link speed, and then disable the Legacy Switch Compatibility Mode and return to a normal, full speed 100mbps full duplex. But then I turn off my computer, and when I boot up again the connection is back in its faulty state of "network cable is unplugged."

Yes, I have a 100mbps connection through my provider, and when working (which is rare) get very close to 100mbps.

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So here are the specifications you guys might need regarding my PC and router:
Motherboard: ASUS Z97-A
PSU: Corsair CX600M
OS: Windows 10 64-bit
Ethernet Driver: Intel(R) Ethernet Connection (2) I218-V
Version: 12.15.23.1 from 5/10/2016 (Intel website says 5/20/2016)

Router/modem: Ubee DDW366 Dual-Band Concurrent Wireless Gateway (http://www.ubeeinteractive.com/products/cable/wireless-gateways/ddw366-dual-band-concurrent-wireless-gateway)

I am using a wired connection through the house. The house has ports throughout it, all of the cabling being Cat 5e, whilst my cable from the port to my motherboard is Cat 6.
The WiFi is decently used, having at most 3 phones, a tablet, and another laptop or two connected. The phones aren't heavily used, and when I'm gaming nobody is awake to be taking any bandwidth.

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Yes I have tried a handful of solutions revolving around the command prompt with all the ipconfig commands, changing a multitude of settings in the network adapter properties, I've messed with some Windows settings, and nothing has given a solid surefire solution to this problem. I've seen only one other forum post on Google involving my problem but the solution was not one I was able to implement, they had a different adapter/components.

If you need any other information please let me know!

Thanks,
Isaac
 
Solution
Yes, you can, you just don't want to. You can temporarily lay cable across the house. BUT if you don't want to do that then you need to move your PC closer. The most likely problem is the in-wall wiring or the wall jacks. BUT the only way to verify that is by using an alternate connection. You could also see what behavior a laptop has using the exact same wiring as your PC.

kanewolf

Titan
Moderator
Yes, you can, you just don't want to. You can temporarily lay cable across the house. BUT if you don't want to do that then you need to move your PC closer. The most likely problem is the in-wall wiring or the wall jacks. BUT the only way to verify that is by using an alternate connection. You could also see what behavior a laptop has using the exact same wiring as your PC.
 
Solution