Two networks, wifi and lan not working

Lenovo /
January 19, 2017 at 17:32:53
Specs: Windows 64, Intel/8gbs
I have Uverse wifi. Two PCs(Win 10 Pro) connected via cross over cable to do backups as the wifi is too slow.
PC1 Lan adapter TCP/ IPv4 properties are static address 10.99.1.10, No Gateway Interface Metric 7.
PC2 Lan adapter TCP/ IPv4 properties are static address 10.99.1.12, No Gateway and Interface Metric 7.
PC1 Wifi adapter automatic with Interface Metric 8.
PC2 Wifi adapter automatic with Interface Metric 8.
If I boot with wifi turned off the direct connection between PCs works fine with no internet connection.
If I boot with wifi I have internet connection, but the direct connection does not work(I can't see Pc2/Pc1), and I lose Network discovery. I then have to turn off wifi go thru Network discovery, declare connection as private and then it will see the other PC.

I've tried to follow tips in numerous posts...I think I'm close but no joy.


See More: Two networks, wifi and lan not working

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#1
January 19, 2017 at 20:49:20
If the two PC's were plugged into a switch and the switch was plugged into the LAN side of your Wifi router then it would be and act more a complete network and should resolve the issue as well as solve the speed problems you have with the Wifi and save the Wifi for your portables.
I do not know 'Interface Metric...' and cannot tell if it has any effect so I will leave any comments on that to others.

You have to be a little bit crazy to keep you from going insane.


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#2
January 19, 2017 at 21:47:00
What IP address range is set for the WIFI?
Set the IP address of the PC LAN outside of the IP address of the WIFI.
Do not set a default gateway for the LAN on PC1/2.

"Metric" decides which Network interface to take in case more than one network interfaces is connected if a default gateway is set for both network interfaces.


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#3
January 20, 2017 at 07:03:51
Windows has issues with dual network interfaces. Typically not having a default gateway IP on one fixes the issue. But not every time.

When swapping between wireless and wired connections on my work laptop, I just disable the one and enable the other.

Control Panel >> Network & Sharing Center >> Change Adapter Settings >> right click on interface to bring up menu and either enable or disable the interface

No rebooting required. Typically I don't have to find my networks again either. I get the feeling you're rebooting each time and you shouldn't have to.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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Related Solutions

#4
January 20, 2017 at 07:29:28
WIFI adaptors set IP address automatically and Obtain DNS server automatically. DHCP Enabled and no Default Gateway specified. The router is assigning address192.168.1.x

Default gateway is not set for LAN on PC1/2


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#5
January 20, 2017 at 07:42:13
Due to the physical location of the AT&T router I can't hard wire.

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#6
January 20, 2017 at 07:53:36
No rebooting required. Typically I don't have to find my networks again either. I get the feeling you're rebooting each time and you shouldn't have to.

Are you rebooting each time you enable/disable your interfaces?

If yes, try it without doing so and post the results.

I'm not sure why you opted for 10.99.1.xx for your wired connections. Keep it simple, 10.0.0.1 and 10.0.0.2 with Subnet Mask 255.255.255.0 for both interfaces.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#7
January 20, 2017 at 08:03:27
No where do I see what the wifi subnet is listed. You want a completely different subnet then the wired connections. Post the results of a ipconfig /all for review

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


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#8
January 20, 2017 at 09:26:00
Microsoft Windows [Version 10.0.14393]
(c) 2016 Microsoft Corporation. All rights reserved.

C:\Users\Dale>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : Dale-Laptop
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : attlocal.net

Ethernet adapter Lan:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : C8-5B-76-76-17-25
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::cd5f:88a0:b7a5:8c5b%10(Preferred)
IPv4 Address. . . . . . . . . . . : 10.99.1.12(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 63462262
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1F-8A-9F-3D-C8-5B-76-76-17-25
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Wi-Fi:

Connection-specific DNS Suffix . : attlocal.net
Description . . . . . . . . . . . : Intel(R) Dual Band Wireless-AC 3165
Physical Address. . . . . . . . . : 84-EF-18-A5-4A-29
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2602:30a:c7f8:a4b0:e8f4:e53e:121f:4383(Preferred)
Temporary IPv6 Address. . . . . . : 2602:30a:c7f8:a4b0:a562:567a:eeab:82ef(Preferred)
Link-local IPv6 Address . . . . . : fe80::e8f4:e53e:121f:4383%20(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.77(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Friday, January 20, 2017 10:56:03 AM
Lease Expires . . . . . . . . . . : Saturday, January 21, 2017 11:11:30 AM
Default Gateway . . . . . . . . . : fe80::16ed:bbff:febd:5db5%20
192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 159706904
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1F-8A-9F-3D-C8-5B-76-76-17-25
DNS Servers . . . . . . . . . . . : 192.168.1.254
NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Local Area Connection* 2:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
Physical Address. . . . . . . . . : 84-EF-18-A5-4A-2A
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Bluetooth Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
Physical Address. . . . . . . . . : 84-EF-18-A5-4A-2D
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{7EB02E1E-98CF-44C8-B757-35BD8B5F8629}:

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

Tunnel adapter Local Area Connection* 5:

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

Tunnel adapter isatap.attlocal.net:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : attlocal.net
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #4
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes


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#9
January 20, 2017 at 11:27:58
I don't know that it will make a difference but you could try killing IPv6 on your network interfaces.

You didn't respond to my last question:

Are you rebooting each time you enable/disable your interfaces?

If you are, try my method that doesn't include rebooting, and then tell me what results you get.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#10
January 20, 2017 at 14:21:53
No I am not rebooting. I'm getting the same behavior as my original post..killing wifi lets the cross over cable connection work. I'm looking for a solution were wifi is on and I still have access to PC2 thru the cross over.
I trying killing IPv6 on both LAN adapters...no change.
It almost seems that there is some switch in BIOS or setting in the adapters that are limiting to only one connection either wifi or lan...not both.

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#11
January 20, 2017 at 15:53:06
This scenario looks similar to yours:
http://serverfault.com/questions/92...

Add a route on PC 1/2


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#12
January 20, 2017 at 16:20:06
Thanks I'll check it out

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#13
January 20, 2017 at 19:44:44
I think that is beyond my technical ability..I may have to live with switching off wifi. I did double check to see if the firewall was a problem, but no. More experimenting tomorow.

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#14
January 21, 2017 at 09:04:43
Hmmmm..........this one is a puzzler.

Thanks for responding to my questions. Sadly, no help there!

I think that's your best bet. Just enable the wired interface when you need to copy and disable when you're done.

If you want to simplify that, you can look into the netsh command. Using it, you could write two batch files that would look something like this:
A) Wired On
1) disable wireless interface
2) enable wired interface

B) Wired Off
1) disable wired interface
2) enable wireless

Then simply put them in a pathed directory like \Windows and you can simply open a command prompt window (Windows Key + R) and type in the batchfile name (ex: wiredon, wiredoff) to enable/disable the wired interface.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#15
January 21, 2017 at 10:43:38
The more I mess around with this I'm thinking I have the proper configuration in the IPv4 adapters on PC1/PC2, static IP with the proper metric values.
PC1 is an older desktop box with a Realtek PCIe GBE adapter.
PC2 is a new Lenovo Ideapad with a Realtek PCIe GBE adapter. I have a hunch that if there is no traffic , the connection times out or gets shutoff to save power. I've looked in the Lenovo BIOS and couldn't find anything there, I've also looked at the advanced properties for the Realtek PCIe GBE card and nothing is obvious to me.
Thanks for your input on the batch files, I'm sure that would work. It's just a matter of choice of whats easier.
I don't know about adding a persistant route for the lan traffic...I'm still researching that avenue.

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#16
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#17
January 21, 2017 at 16:16:22
Thanks 4 all the info..I will check it out

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