0


I am not sure if this is the right platform to ask this question, and please consider me a newbie.

I was using a ADSL modem given by BSNL (ISP).

I bought a D-Link WiFi ADSL Router(DSL-2730U) and the setup is now:
Phone Line->D-link Modem+Router->PC

I set up the PC connection(The setup wizard was helpful).
I connect with my android phone via WiFi.

My PC was working fine until it was shut down.
After that it shows the yellow warning thingy on the network icon.
After selecting troubleshooting, it says the error is

Local Area Connection does not have a valid IP configuration

What is the problem?
PS: I checked IP of PC and mobile, It is different. PC has dynamic ip.

Edit: ipconfig /all when error shows note: When there is no error, ip is: 192.168.1.34

Windows IP Configuration

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

Ethernet adapter Local Area Connection:

  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::3808:5cf0:c183:8408%13(Preferred)
  Autoconfiguration IPv4 Address. . : 169.254.132.8(Preferred)
  Subnet Mask . . . . . . . . . . . : 255.255.0.0
  Default Gateway . . . . . . . . . :
  DHCPv6 IAID . . . . . . . . . . . : 184549376
  DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1B-AE-1C-0E-D0-27-88-5B-79-22

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

  • Hey welcome to SU, so your configuration goes like this: Phone Line ADSL > Modem > D-Link Router > PC correct? When you say the IP's are different do you mean they are like 192.168.0.3 and 192.168.0.6 or are they completely different like 10.100.3.4 and 192.168.1.10? Basically trying to figure if the wireless and the cable are on the same IP Range. – CharlesH Dec 24 '14 at 8:08
  • thanks @CharlesH, It is a modem+router. So, Phone Line->D-link Modem+Router->PC... now the ip@mobile:192.168.1.34 and the ip@PC:192.168.1.33... But now the connection is working. It comes and goes every time PC is restarted.. – Jacob Thazhath Dec 24 '14 at 8:42
  • Ah ok so its a modem router thats good it eliminates one element from the troubleshooting. OK so both are on the same IP Range which is good. When you restart and the connection is down (showing the error in your question) can you make this happen and then open the command prompt from the start menu and type ipconfig /all then post the results back in your question. – CharlesH Dec 24 '14 at 9:01
  • @CharlesH, added ipconfig results along with the question.. – Jacob Thazhath Dec 24 '14 at 13:17
  • PS: Please see that, at the toime of error, the physical address is 00-00-00-00-00-00 – Jacob Thazhath Dec 25 '14 at 13:30
0

The problem lies with your PCs network card. Sometimes it fails to show its MAC addess (see your line with Physical Address. : 00-00-00-00-00-00).

The MAC address is an unique 48 bits identifier, think of it as a serial number for a network card. This address is used by the Ethernet protocol and it should be valid. 00:00:00:00:00:00 is not valid.

I can only think of three ways for this to go wrong:

  1. Error at the manufacturer. It should never have worked. (though it is possible the old setup was more forgiving).
  2. Damage while changing your setup.
  3. Some cards allow you to override the MAC with your own address. It then fall supon you to make sure that you have a legel and unique MAC for each networkcard on your local network. You mention some kind of wizard. Did that ask questions about cloning setting?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.