Flushes and resets the contents of the DNS client resolver cache. During DNS troubleshooting, you can use this procedure to discard negative cache entries from the cache, as well as any other entries that have been added dynamically. Initiates manual dynamic registration for the DNS names and IP addresses that are configured at a computer. You can use this parameter to troubleshoot a failed DNS name registration or resolve a dynamic update problem between a client and the DNS server without rebooting the client computer.
To specify an adapter name, type the adapter name that appears when you use ipconfig without parameters. Renews DHCP configuration for all adapters if an adapter is not specified or for a specific adapter if the adapter parameter is included. This parameter is available only on computers with adapters that are configured to obtain an IP address automatically.
Renews DHCPv6 configuration for all adapters if an adapter is not specified or for a specific adapter if the adapter parameter is included. This parameter is available only on computers with adapters that are configured to obtain an IPv6 address automatically.
Please Note:- if you statically assigned or manually assigned IP address, this command will not work. Depending on how the DHCP server is configured, IP address you will get can be one you had last time or it can be a new one. Depending on how the DHCP server is configured or the available addresses, IP address you will gain can be one you had last time or it can be a new IP address.
When you run this command, it will typically take just seconds for a DHCP assigning your computer system with an IP address. If there are multiple adapters, the output can be long making it cumbersome to find what you are looking for. Findstr utility can be used to find the patterns of text. What this does is exclude any network adapters which are not connected or disabled.
These network adapters will show the MAC address that starts with When you open a site with its domain name e. Once your system learns the associated IP address for the site you want to see, it will cache it on your computer. Purpose of doing so is to improve the performance by not having the computer perform a DNS lookup each time you access a webpage on the site.
Running command will list all the currently cached IP addresses on your computer. And if computer has accessed a lot of websites since turning on, this list can be very lengthy.
This command is typically utilized to troubleshoot the specific DNS lookup problems. The information displayed on your screen could be the list of:. You would typically use this command in order to troubleshoot the DNS related problems. An example of this could be, when you try to access a site but you face an error message displaying site is not found.
This command has a great use of troubleshooting DNS name registration issues without rebooting your computer system. As you have seen above, the ipconfig command in windows OS is a very useful tool for network troubleshooting and diagnosing pc, and you can get a lot of useful and important information if you apply the right switches to do so. Instead of displaying all your information on the screen, you can also save it automatically to a text file on your computer system.
And to see the result, you can open this file with notepad or with any text editor, as illustrated below. Website Application Questions Mixed Blogs. Please try again. You're in! Thanks for signing up. There was an error. Tell us why! More from Lifewire. How to Reset Network Settings in Windows Your Privacy Rights. To change or withdraw your consent choices for Lifewire. At any time, you can update your settings through the "EU Privacy" link at the bottom of any page.
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