Default Gateway Unavailable / Invalid IP Configuration

[Marcus Gibeson]

Hello, I've been having trouble with my internet. Figured I'd hop on a forum and see if someone can help me figure it out.
I was in the middle of an overwatch game, and my internet cut out on me randomly. I have only been connected with ethernet.
Running Windows Diagnostics, I get the errors "Ethernet" doesn't have a valid IP configuration and The default gateway is not available.

Steps I've taken:
1. Reset modem and computer. Computer will connect once modem finishes self-tests, but only for about 30 seconds.
2. Ipconfig /release and /renew. Command Prompt will freeze after using /renew. Does nothing to fix it.
3. Uninstalled all antiviruses. Read somewhere that MacAfee sometimes caused it. Although I only used AVG and Avast.
4. Reset windows. Didnt work, but it gave me a hella headache trying to redo all my files.
5. Reset modem to factory settings. Had to resetup my Network. All devices except my computer will connect.
6. Read multiple forums but havent been able to find a solution. Decided to post, hoping someone can help.

Recap: Computer drops default gateway after modem restarts. Can't renew ip addresses. No internet.

Thank you for any advice you can offer.

 

[DelJo63]

Show us the tcpconfig

• ipconfig /all >myTcp.txt

open myTcp.txt, copy the content and paste as your follow-up...

 

[Marcus Gibeson]

I'm using my phone, had to do a bit of file transferring. But here it is:
C:'Users'Marcus>ipconfig /all



Windows IP Configuration



Host Name . . . . . . . . . . . . : Gladius

Primary Dns Suffix . . . . . . . :

Node Type . . . . . . . . . . . . : Hybrid

IP Routing Enabled. . . . . . . . : No

WINS Proxy Enabled. . . . . . . . : No



Ethernet adapter Local Area Connection:



Connection-specific DNS Suffix . :

Description . . . . . . . . . . . : Killer e2200 Gigabit Ethernet Controller (NDIS 6.30)

Physical Address. . . . . . . . . : D4-3D-7E-F7-39-AB

DHCP Enabled. . . . . . . . . . . : Yes

Autoconfiguration Enabled . . . . : Yes

Link-local IPv6 Address . . . . . : fe80::1863:d686:9920:6815%3(Preferred)

Autoconfiguration IPv4 Address. . : 169.254.104.21(Preferred)

Subnet Mask . . . . . . . . . . . : 255.255.0.0

Default Gateway . . . . . . . . . :

DHCPv6 IAID . . . . . . . . . . . : 47463806

DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-20-AA-93-F6-D4-3D-7E-F7-39-AB

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.{1A6422B6-1400-4DC7-8FBB-9C9CC743AE1E}:



Media State . . . . . . . . . . . : Media disconnected

Connection-specific DNS Suffix . :

Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2

Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0

DHCP Enabled. . . . . . . . . . . : No

Autoconfiguration Enabled . . . . : Yes



I changed the name of my connection from "Ethernet" to Local Area Connection this morning. Didnt seem to have an effect

 

[Marcus Gibeson]

One more thing that I forgot to put down in original post, I double checked my TCP/IP settings in my connection properties. Everything is set to obtain IP/DNS address automatically.

 

[DelJo63]

One more thing that I forgot to put down in original post, I double checked my TCP/IP settings in my connection properties. Everything is set to obtain IP/DNS address automatically.

Yes, but it is FAILING :sigh:

• Ethernet adapter Local Area Connection:
• Connection-specific DNS Suffix . :
• Description . . . . . . . . . . . : Killer e2200 Gigabit Ethernet Controller (NDIS 6.30)
• Physical Address. . . . . . . . . : D4-3D-7E-F7-39-AB
• DHCP Enabled. . . . . . . . . . . : Yes <<CORRECT SETTING
• Autoconfiguration Enabled . . . . : Yes
• Link-local IPv6 Address . . . . . : fe80::1863:d686:9920:6815%3(Preferred)
• Autoconfiguration IPv4 Address. . : 169.254.104.21(Preferred)
• Subnet Mask . . . . . . . . . . . : 255.255.0.0
• Default Gateway . . . . . . . . . : << HERE'S THE FAILURE
• DHCPv6 IAID . . . . . . . . . . . : 47463806
• DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-20-AA-93-F6-D4-3D-7E-F7-39-AB
• DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
• fec0:0:0:ffff::2%1
• fec0:0:0:ffff::3%1
• NetBIOS over Tcpip. . . . . . . . : Enabled
  

You need to disable IPv6

control->Network & Sharing
on the left, CHANGE ADAPTER SETTINGS
dbl-click on Local Area Connection
clk Properties lower left
look in the box for Internet Protocol Version 6 (TCP/IPv6)
CLEAR the box [x] in front of it
clk OK, then click Close

Disconnect the PC from the router, wait 15 seconds and then plug it back in.

control->Network & Sharing should now show Internet is available
and the IPCONFIG will show your gateway address

 

[Marcus Gibeson]

Alright, turned it off. Seems like everything is working. You are the man Jobeard. Thank you so much. Any idea why it would have suddenly stopped working? Havent touched my IP settings since I built her a few years ago.

 

[Marcus Gibeson]

Hold on, spoke too soon. Same problem. It connected for a couple minutes tho.

 

[Marcus Gibeson]

This issue has been solved. I power cycled everything, reconnected wires and it started working perfectly.