Ethernet doesn't have a valid IP config, windows 10

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bullerephon

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Jan 24, 2016
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So I've had this issue since before I updated to windows 10. I put a fresh install of Win 7 Ult on a new SSD and upgraded to win 10. I haven't been able to get on at all and none of the fixes I've tried have worked so far.

Tried rolling back to Win 7 and reinstalling Win 10 but that didn't work.

Tried doing the whole winsock reset thing.

Ipconfig /renew just hangs

Found the newest drivers for my Realtek lan card but they don't work.

Anybody got any more ideas.
 
Solution
Ralston18
You probably duplicated an IP address. Especially if you assigned a static IP address that matched a DHCP IP address already assigned by the router.

All sorts of things, none good, happen with duplicate IP addresses.

Static IP's are usually reserved for shared network devices such as printers, NAS devices, etc. And those static IP addresses are set outside of the IP address range allowed for DHCP use. And the number of DHCP assigned devices can be limited also. IP addresses can also be reserved for/via select MAC addresses.

All that could easily become one of the TL:DR discussions. Different philosophies, best practices, requirements, security, etc..

Doubt that it is a hardware problem at this point. A loose cable, bad...
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bullerephon

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And here's the ipconfig /all for you guys :)

Microsoft Windows [Version 10.0.10586]
(c) 2016 Microsoft Corporation. All rights reserved.

C:\Windows\system32>ipconfg /all
'ipconfg' is not recognized as an internal or external command,
operable program or batch file.

C:\Windows\system32>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : DESKTOP-B3OUSJD
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 00-00-00-00-00-00
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::d0c2:5dd6:bab:6a8d%2(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.106.141(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 33554432
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1E-36-76-ED-00-00-00-00-00-00
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{0D726853-A125-4A87-962D-BD8F943FFA15}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
 
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bullerephon

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Hmm yeah I see that now but I have it set to obtain an IP automatically so shouldn't it be grabbing the correct subnet mask?
 
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Ralston18

Ralston18

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Oct 11, 2014
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No.

Otherwise there would not be any need to configure subnet masking on the adapter.

And even if so, then things would become equally and more confusing if we needed to do some sort of automatic subnet assignment "DHCP like" process to get devices on the correct network/subnet.......

E.g., use GPS to put the west side of the factory on one network and the east side of the factory on another. If the east side is two story and needs two networks itself (one on each floor) then what....altitude?

Not realistic of course, but it does demonstrate how is quickly such things would become unmanageable.



 
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bullerephon

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Jan 24, 2016
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Gotcha.

Well I tried manually configuring the ipv4 settings using the ipconfig /all from another computer on the network but that didn't work. Was probably a long shot using a static ip.

Looking at the ipconfig /all from my problem computer, I'm noticing the there is no Physical address, could it be a problem with the hardware?
 
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bullerephon

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Jan 24, 2016
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I fixed the problem. I had another hard drive with Windows 7 still on it. I unplugged that hard drive and the problems went away. Now I don't know the exact issue, maybe a permissions issue? Hopefully this helps someone else!
 
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Ralston18

Ralston18

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Oct 11, 2014
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You probably duplicated an IP address. Especially if you assigned a static IP address that matched a DHCP IP address already assigned by the router.

All sorts of things, none good, happen with duplicate IP addresses.

Static IP's are usually reserved for shared network devices such as printers, NAS devices, etc. And those static IP addresses are set outside of the IP address range allowed for DHCP use. And the number of DHCP assigned devices can be limited also. IP addresses can also be reserved for/via select MAC addresses.

All that could easily become one of the TL:DR discussions. Different philosophies, best practices, requirements, security, etc..

Doubt that it is a hardware problem at this point. A loose cable, bad connector, poorly seated cards would be hardware problems.

Not sure why there is no physical address - should be the MAC. Again check your ethernet card settings - did you tweak anything regarding MAC? They can be changed...... Make sure that you did not check/uncheck a setting that forces the 00:....etc. physical address.

If you "google" the 169.254.106.141 IP address I think you will find that that is a default IP address that MS assigns its' host device when an IP address is otherwise unavailable.

For now the goal is to get things running and stable.

 
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