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How to Check TCP/IP Configuraitons



The first step in the troubleshooting process is to check the TCP/IP settings. You can check it by using the IPCONFIG/All command on the command prompt. You will see the configuration results. If you see a blank configuration for a card this means then the card is not assigned any IP address. You can assign the IP address manually or via DHCP server. If you are using the DHCP server for assigning the IP addresses then you can use the following commands to get and release the IP address.
IPConfig/Release
IPConfig/Renew
IPConfig/All
If the computer is still unable to obtain an IP address, then there are several things that can causing this problem such as bad network cable or NIC card, DHCP server might have assigned all the IP addresses from its pool, mis-configured TCP/IP settings, incorrect user name and password. You can try to add a new well configured machine to the replace the malfunctioning machine to see if the new machine is working with its settings. Also see if the driver of the NIC is properly installed or not. In case of driver's problem go to the vendor's website and install a new exact driver for the NIC.

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2 Answers

How do I get tcp/ip address from ISP provider (BigPond)


Normally TCP/IP addresses are allocated using DHCP by the provider to the router. The router will have a private address range, which will be given to a local network by its own TCP/IP.

http://support.telstra.com.au/t5/support/ct-p/Support

Feb 13, 2015 | Computers & Internet

1 Answer

I have a surface tablet unable to connect to wi fi


Solution 1 - Reset TCP/IP stack

To reset your TCP/IP stack, do the following:
  1. Right-click on the Start Menu button and open Command Prompt (Admin)
  2. Type the following command and press Enter: netsh int ip reset
  3. Reboot your PC and check if you're able to connect to WiFi network. If you can, you're good to go, but if not, type the following commands in the elevated Command Prompt and press Enter after each one:
  • netsh int tcp set heuristics disabled
  • netsh int tcp set global autotuninglevel=disabled
  • netsh int tcp set global rss=enabled
  • ipconfig /flushdns

Solution 2 - Re-configure WiFi Adapter

Maybe reconfiguring your WiFI adapter will solve the problem. To do so, follow next steps:
  1. Go to Search, type device manager and open Device Manager
  2. Right-click on your wireless adapter and go to Properties
  3. Go to Power Management tab, uncheck Allow the computer to turn off this device to save power and click OK
  4. Modify the default power plan, and switch it from high energy savings to low

Jun 30, 2014 | HP Compaq nc6000 Notebook

1 Answer

problems big problems


Verify that TCP/IP (or other appropriate protocol) is properly installed.

  1. Open Control Panel and open Network Connections or Network and Sharing Center, then click Change adapter settings. The wireless card should be present as Wireless Network Connection.
  2. Right-click the appropriate Wireless Network Connection and select Properties. In the Properties window, make sure that the Internet Protocol (TCP/IP) or Internet Protocol Version (TCP/IPv4) is installed.
  3. If TCP/IP is not installed, click Install, click Protocol, and then click TCP/IP.
  4. Once installed make sure that Obtain an IP address automatically, and Obtain DNS server address automatically are checked (if using DHCP). To verify this, highlight the TCP/IP protocol, and select Properties.
Note: Only use a Static IP Address if your network/Service Provider requires one.

8.Verify the TCP/IP address.

  1. Click Startwindows%20start%20button.png, select All Programs, select Accessories, and then click Command Prompt.
  2. Type the command, ipconfig. This will list the IP address for the local machine.
  3. If this returns a 169.x.x.x or 0.0.0.0 address, then type the following commands;
    ipconfig /release and then
    ipconfig /renew.

    You should then receive a TCP/IP address appropriate to your network, along with a Default Gateway address.
  4. Try to communicate with it by typing this command ping x.x.x.x where x.x.x.x is the IP address of the Default Gateway. (i.e. ping 192.168.1.1)
  5. If this does not give a reply (see the example in step 9) or you did not receive a TCP/IP address, go to the next step.
  6. If you are connecting wirelessly, but receiving an IP address, your wireless router/Access Point might need to be reset (unplug power for a minute, then plug back in), or maybe defective. Please consult your wireless router/Access Point manufacturer for further assistance.

9. Ping the loopback address.

  • Click Startwindows%20start%20button.png, select All Programs, select Accessories, and then click Command Prompt.
  • Type the command, ping 127.0.0.1. This will send a message to the internal network stack on the machine. You should see a response like this:

    Pinging 127.0.0.1 with 32 bytes of data:

    Reply from 127.0.0.1: bytes=32 time<10ms TTL=128
    Reply from 127.0.0.1: bytes=32 time<10ms TTL=128
    Reply from 127.0.0.1: bytes=32 time<10ms TTL=128
    Reply from 127.0.0.1: bytes=32 time<10ms TTL=128

    Ping statistics for 127.0.0.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
    Approximate round trip times in milliseconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms
  • If instead, you receive errors, then there maybe system corruption or malware installed preventing networking from functioning properly.
  • 10. Verify that the hardware is functioning using diagnostics.

    • Check the web site, http://support.lenovo.com. Choose Download Drivers and Software and enter your particular system. Then under Diagnostic choose the download for your system. If diagnostics fail, please contact warranty support for resolution.
    • Run diagnostics for third party wireless card.
      Note: If using another manufacturer's product, then consult it's documentation on how to run the diagnostics for the wireless card.

Mar 10, 2014 | Lenovo ThinkPad R60 with Wireless Wide...

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