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Check Domain Name, DHCP and IP Address




In Active Directory world especially for newbie System Administrator or even for seasoned System Administrator who just acquired a messed up network from someone else hand, knowing or checking the domain name and whether network is using DHCP or not is quite important to get started on the job.

Of course, IPCONFIG and its parameters is an important tool to manage or troubleshoot a Windows system.

Typing “ipconfig /all” from command line will list a long and detailed output depending on the configuration of the system.

With the aid of other command line tools, as long as the system administrator knows exactly what he or she wants the output can be very specific.

In Linux environment piping commands or running multiple commands in one line is quite common.

For Windows System Administrator Powershell will come in handy if executing multiple commands in one line.

Command prompt in Windows also offers to run multiple commands in one line.

Example below is a one liner commands that gets the domain name, check whether DHCP is enabled or not and also gets the IPV4 address of the system.

To get the domain name, checking whether DHCP is enabled or not is quite important to troubleshoot a Windows Active Directory client or computer if the user claims that he/she is not able to connect to network shares or the internet.

By typing the command below, the output will tell the issue why the client or user is not able to connect to network shares or internet.

There are a lot of issues, reasons why a computer is not able to connect to network shares or internet.

Checking the network connectivity is a basic way of troubleshooting why a computer is not able to connect to network or internet.

Open a command prompt and type the commands below:

C:\>ipconfig /all | find "Primary Dns Suffix" & ipconfig /all | find "DHCP Enabled" & ipconfig /all | find "IPv4"

Sample output:
   Primary Dns Suffix  . . . . . . . : MyDomainName.local
   DHCP Enabled. . . . . . . . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 192.168.150.3(Preferred)


Above output was taken from a working computer and it shows the domain name, check if DHCP is working and also check assigned IPV4 address by DHCP.

Instead of looking of the long output, by running multiple commands output is short and specific and it’s easy to read.

So if the output does not show the correct domain name then it could be that the client is logon to a different domain if the network has multiple domains or the client is logon locally and not to the domain.

If the DHCP is enabled on the network but the client shows DHCP is not enabled and the IPV4 is not showing the correct IP Address and other computers on the network is working fine, then it could be that the cable is spoiled or not connected and a lot of other possible issues.

Anyway, command line tools in Windows support piping and running multiple commands in one line. Above command is just one example, so if you’re stuck running multiple commands try combining it in one line and see how it goes.

In the Linux world you run multiple commands in one line by inserting the semi-colon ";". In Windows you run multiple commands in one line by inserting the ampersand character "&".

To run command lines in VB.Net.

Check out this link: http://quickbytesstuff.blogspot.sg/2013/12/vbnet-run-dos-command.html


Cheers..till next time.

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