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Windows 7: LAN Unidentified Network


24 Jun 2011   #1

Windows 7 Professional 32 bit
 
 
LAN Unidentified Network

Hey all,

I've read more people have this issue, but none of the solutions given seem to work for my problem. I've been running on Windows 7 for a month or so now, without any problems. Yesterday a SP1 update was performed in the afternoon and still, no problems. Around 10pm I put it into sleep and when I returned about 5hours later and started it up again, the problem occured and has remained so.

Few things to note, I have a router connected to another router, which is connected to the internet. The router closest to the modem gives me perfect wireless internet. The second router also connects a LAN cable to my playstation 3, which also works perfectly so the problem lies with my laptop (I even connected it directly to the modem, but still the unidentified network problem).

I've tried to: Reset modem, routers and laptop. I've run the microsoft Fixit, which didn't fix anything. I've downloaded and installed the most update drivers of my ethernet. I've performed a system restore to around the time of the update.

Nothing seems to work, resulting in my laptop not being able to connect to ANY LAN cable/network whatsover. Wireless works fine, but that just won't cut it for me.

Anyone know any good fix for this problem?


My System SpecsSystem Spec
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24 Jun 2011   #2

Windows 8.1 x64 x3 + Windows 10 Preview
 
 

Please open an elevated command prompt, run an IPCONFIG /All command and post the results here.

Please * out any personal data and external IP addresses for your security

Also you state that this problem started after a sleep period - have you rebooted the system since this error started?
My System SpecsSystem Spec
24 Jun 2011   #3

Windows 7 Professional 32 bit
 
 

I presume you only need the information from the ethernet adapter so I only copied that part:

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82567LM Gigabit Network Connecti
on
Physical Address. . . . . . . . . : 00-25-B3-BF-98-B6
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe**::4**8:32f8:***e:57****1(Preferred)
Autoconfiguration IPv4 Address. . : ***.***.**.***(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 234890675
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-15-5A-77-03-00-25-B3-BF-98-B6

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

Don't know if it makes a difference, but I captured this while my wireless network was on.

As for your other question, I shut down the laptop after it hadn't worked and rebooted it about two times after that.
My System SpecsSystem Spec
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24 Jun 2011   #4

Windows 8.1 x64 x3 + Windows 10 Preview
 
 

Ok

As you have two routers it is likely that you have to set things up carefully - I assume that the devices are ...

all on the same subnet 192.x.x.x
DHCP is switched on, on just one router (preferably the one connected to the external ISP)
you can ping both of the routers

Can you ping an external address by name and ip (208.67.222.222 is an IP number to check)?

Check these with the wireless off
My System SpecsSystem Spec
24 Jun 2011   #5

Windows 7 Professional 32 bit
 
 

Pinging that adress with wireless off resulted in 4 times request timed out, 4 packets send, 4 packets lost.

As for the setting up of the two routers, that setup has been the same for over 4 years, with the only change being in my software, updating Windows 7 to SP1 or something. Besides, the ps3 that is connected the exact same way as my laptop works fine.
On top of that, a direct linked connection the my modem results in the same problem, unidentified network, no network access.
My System SpecsSystem Spec
24 Jun 2011   #6

Windows 8.1 x64 x3 + Windows 10 Preview
 
 

Looks like it may be a problem with the lan driver in the laptop, this can be caused by an upgrade to windows
what I suggest is to go into the device manager and firstly disable and then re-enable the lan driver.

If this does not work you can try un-installing the driver and letting windows re-install.

Depending on the actual chip in the laptop it may be best to download the latest driver from the manufacturer's site and install this
My System SpecsSystem Spec
24 Jun 2011   #7

Windows 7 Professional 32 bit
 
 

I already performed those suggested solutions. I downloaded the latest version on the intel website and installed it. I tried disabling and enabling it and also uninstalled it and let windows reinstall it. All of those things didn't seem to fix the problem.
My System SpecsSystem Spec
24 Jun 2011   #8

Windows 8.1 x64 x3 + Windows 10 Preview
 
 

I've just noticed that there is no default gateway shown

Can you manually enter the gateway address into the IPv4 settings - I would add the address of the router connected to the ISP first and if there are still issues enter the other router but with a lower "metric" for the non ISP one.

this should be automatic but the two routers may be confusing matters
My System SpecsSystem Spec
24 Jun 2011   #9

Windows 7 Professional 32 bit
 
 

Hmm, I just went to a friend and plugged my laptop into his LAN and it immediately worked.

Maybe I forgot to reset my modem when I connected my laptop directly. At least it shows that the problem is not on my laptop but apparently inside my network at home, though it's strange it suddenly changed.

I'm not at home during the weekend so I'll test some stuff on monday, including your solution of entering the gateway manually.

Anyway, thanks for the help so far and hopefully you'll be around monday if it still doesn't work!
My System SpecsSystem Spec
24 Jun 2011   #10

Windows 8.1 x64 x3 + Windows 10 Preview
 
 

It's always a good general thing to do a sequenced power recycle with network systems - power down all items, then, power each back on in sequence from the ISP end to the problem device - Modem, router(s) device, giving each item time to finish it's initialise routine.

I Should be here Monday
My System SpecsSystem Spec
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 LAN Unidentified Network




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