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Windows 7: "Unidentified network" - No internet access (LAN)

11 Mar 2013   #1
HelloThere

Windows 7 Ultimate x64
 
 
"Unidentified network" - No internet access (LAN)

Hello there!

I'm sorry this has been posted numerous times before, but I've read through everything, but haven't yet found a fix. The problem is I get the "Unidentified network" message when I try to connect to the internet via LAN. I just built a new PC, and started getting this error. I've never used LAN before, and the same issue occurs when I try it on my laptop. Wi-Fi works fine, though.

I've tried the following:
* Uninstalling, reinstalling network adapter driver
* "netsh winsock reset", "netsh int ip reset resetlog.txt", "ipconfig /flushdns"
* Reverting machine settings to before the first Windows update
* Disabling IPv6
* Changing LAN cable
* Connecting to another PC
* Changing "Speed and duplex" settings
* Turning off firewall (no anti-virus installed)
* Reseting and restarting router, as well as trying other ports
Edit:
* Reseting DHCP and DNS client (both set at automatic startup)

Ipconfig:
Quote:
Windows IP Configuration

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


Ethernet adapter Local Area Connection:


Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet
Physical Address. . . . . . . . . : BC-5F-F4-2B-4A-59
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::f41e:86d3:c613:654e%12(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.101.78(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 213671924
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-AA-F3-61-BC-5F-F4-2B-4A-59


DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled


Ethernet adapter Local Area Connection 2:


Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet #2


Physical Address. . . . . . . . . : BC-5F-F4-49-B0-60
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes


Tunnel adapter isatap.{B8744701-36BB-4CD4-8CC8-69B563D4B05A}:


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 isatap.{8F535E61-1087-43CC-BE6F-AEA9B74E3A69}:


Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes


Tunnel adapter Teredo Tunneling Pseudo-Interface:


Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Any help would be greatly appreciated!


My System SpecsSystem Spec
.
11 Mar 2013   #2
DMHolt57

 
 

the subnet mask should be 255.255.255.0 and the default gateway is not present, what is your router brand, are you using a range extender? Try changing Workstation on the system page to something personal on all your machines, then setup the network connection from the main page of Network and Sharing, setup new connection or network. Your router address should be the default gateway and can be set in the advanced button of the ipv4 properties page, something like 192.168.0.1
My System SpecsSystem Spec
11 Mar 2013   #3
UsernameIssues

W7 Pro SP1 64bit
 
 

Welcome to the Seven Forums.

And thanks for the detailed post.

You are getting a "169..." IP address. Do you see that?

Code:
Autoconfiguration IPv4 Address. . : 169.254.101.78(Preferred)
Do you also get a "169..." IP address when the laptop is connected via that same LAN cable?

If so, then check to see if DHCP is turned on at the router.
My System SpecsSystem Spec
.

11 Mar 2013   #4
benjy206

Windows 7 Ultimate 64-bit
 
 

Yes i would say its a problem with the DHCP on the router. If you open command prompt - start - cmd - type the following command: ipconfig /release
: ipconfig /renew
See if this helps
My System SpecsSystem Spec
11 Mar 2013   #5
HelloThere

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by DMHolt57 View Post
the subnet mask should be 255.255.255.0 and the default gateway is not present, what is your router brand, are you using a range extender? Try changing Workstation on the system page to something personal on all your machines, then setup the network connection from the main page of Network and Sharing, setup new connection or network. Your router address should be the default gateway and can be set in the advanced button of the ipv4 properties page, something like 192.168.0.1
Quote   Quote: Originally Posted by UsernameIssues View Post
Welcome to the Seven Forums.

And thanks for the detailed post.

You are getting a "169..." IP address. Do you see that?

Code:
Autoconfiguration IPv4 Address. . : 169.254.101.78(Preferred)
Do you also get a "169..." IP address when the laptop is connected via that same LAN cable?

If so, then check to see if DHCP is turned on at the router.
Thanks for the replies.

I tried manually setting the IP (191.168.100.4 - as specified in the router for "Workstation"), subnet mask (255.255.255.0 or 255.255.0.0) and the default gateway (the address I use to connect to the router in the web browser), but it doesn't work, and I get an error.

Router: Huawei HG8245.

On the laptop I get 191.168.100.2 as the IPv4 address, as well as the router's IP next to the default gateway (which on my workstation is blank), and the subnet mask being 255.255.0.0.
My System SpecsSystem Spec
11 Mar 2013   #6
HelloThere

Windows 7 Ultimate x64
 
 

@benhy206: Will try it now.

Edit:

Ipconfig /release:

An error occurred while releasing interface Local Area Connection : An address has not yet been associated with the network endpoint.

An error occurred while releasing interface Loopback Pseudo-Interface 1 : The system cannot find the file specified.

* * *

/renew

An error occurred while renewing interface Local Area Connection: Unable to contact your DHCP server. Request was timed out.

An error occurred while releasing interface Loopback Pseudo-Interface 1 : The system cannot find the file specified.
My System SpecsSystem Spec
11 Mar 2013   #7
benjy206

Windows 7 Ultimate 64-bit
 
 

well yes if the IP is 191.x.x.x then it's a class B subnet which is 255.255.0.0 not 255.255.255.0. what is the default gateway on your laptop?
My System SpecsSystem Spec
11 Mar 2013   #8
UsernameIssues

W7 Pro SP1 64bit
 
 

If you plug the laptop into the same LAN cable that they desktop was using...
...then restart the laptop
...do you still get 191.168.100.2 for an IP address?
...can you surf the web while connected that way?

If so, then I misunderstood when you said "...and the same issue occurs when I try it on my laptop". I erroneously extended that to you not being able to surf from the laptop when using the LAN cable and you only meant to convey that the laptop gets the same "Unidentified network" message. My bad.

If the laptop can surf after restarting while using the LAN cable - then the DHCP server is working on the router. Unless it has been assigned a tiny range of IP addresses to dole out (like 2 thru 4), then there is probably nothing wrong with the router. It appears as if the desktop's motherboard has two network adapters. Have you tried them both?

It also sounds like this LAN cable configuration used to work - because you have installed updates. Maybe one of those updates was a network driver. If so, then back that update out.
My System SpecsSystem Spec
11 Mar 2013   #9
benjy206

Windows 7 Ultimate 64-bit
 
 

Looks like a driver issue. Maybe! Have you done any updates on the pc? If so like usernameissues says roll back the driver.

One more thing to try is ping you NIC card

ping 127.0.0.1
My System SpecsSystem Spec
11 Mar 2013   #10
HelloThere

Windows 7 Ultimate x64
 
 

...then restart the laptop

...do you still get 191.168.100.2 for an IP address?
Yes.
...can you surf the web while connected that way?
No, only through Wi-Fi.

LAN works neither on the laptop nor the other PC, but on the laptop it displays the default gateway (router address), which on the other is blank.

It appears as if the desktop's motherboard has two network adapters. Have you tried them both?
Indeed, none work.

I've uninstalled and installed the latest network driver. Then again, it doesn't work on the laptop either.


ping 127.0.0.1

Quote:
Pinging 127.0.0.1 with 32 bytes of data:
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

Ping statistics for 127.0.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
My System SpecsSystem Spec
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