Use ipconfig Commands to Get/Renew IP Address & Flush DNS - MiniTool

This article introduces the ipconfig command in Windows system, covering its various uses, such as obtaining IP addresses, releasing and renewing IP addresses, refreshing DNS caches, etc. Mastering these commands can effectively solve network configuration problems.

What is ipconfig command?

ipconfig is the abbreviation of Internet protocol configuration, which is a console application in the Windows operating system to display the current TCP/IP network configuration value, such as IP address. It can also refresh the DNS (domain name system) settings, update the DHCP (dynamic host configuration protocol) settings, etc. ipconfig command is also suitable for macOS and ReactOS systems.

Detailed explanation of the main ipconfig command

Before using the ipconfig command, you must open the Windows command prompt. Press Windows R , enter cmd , and press Ctrl Shift Enter to run the command prompt as administrator.

Get the IP address

Enter the ipconfig command (without parameters) in the command prompt window and press Enter . This command will display the IPv4 and IPv6 addresses, subnet masks, and default gateways for all adapters.

The ipconfig command displays the basic TCP/IP configuration for all adapters. To display the full TCP/IP configuration for all adapters on your computer, enter ipconfig /all command and press Enter . The information displayed by ipconfig /all command is more detailed than the ipconfig command, including IPv4 address, IPv6 address, DNS server, MAC address, adapter description, DHCP details, etc.

ipconfig /release command

This command releases IPv4 addresses of all network adapters. To release all adapters' IPv6 addresses, type ipconfig /release6 command and press Enter.

To release the IPv4/IPv6 address of a specific adapter, you can use ipconfig /release [适配器] or ipconfig /release6 [适配器] commands. Replace "[Adapter]" in the command with the exact name of the target adapter. You can view the names of all adapters by entering the ipconfig command.

ipconfig /release command sends a DHCP release notification to the DHCP server, forcibly release the current DHCP configuration and IP address, and marks the IP address of the old client as available.

ipconfig /renew command

After releasing the old IP address using the ipconfig /release command, you can enter ipconfig /renew command and press Enter to request a new IP address for the client. This command will update the DHCP configuration for all adapters.

To update the IP address of a specific adapter, you can use ipconfig /renew [适配器] command. For IPv6, you can use the ipconfig /renew6 [适配器] command. Enter the real adapter name in the command.

ipconfig /displaydns command

The computer creates a local cache of all DNS records. DNS resolver cache is used to convert domain names to IP addresses. To check the details of all DNS records, you can enter the ipconfig /displaydns command in the command prompt and press Enter. It will display information such as DNS record name, type, survival time, data length, section, etc.

ipconfig /flushdns command

This command refreshes and resets the DNS resolver cache. When troubleshooting DNS issues, you can use this command to clear the problematic DNS cache entries and ensure that future requests use the latest DNS information.

ipconfig /registerdns command

This command refreshes all DHCP leases and re-registers DNS names.

ipconfig /showclassid command

This command displays all DHCP class IDs for all adapters. Enter ipconfig /showclassid6 command to display all IPv6 DHCP class IDs. For a specific adapter, add the adapter name at the end of the command.

ipconfig /setclassid command

Enter this command to configure the DHCP class ID of the adapter. For a specific adapter, add the adapter name at the end of the command.

ipconfig /? Command

Displays help information for the ipconfig command.

Summarize

This article introduces various ipconfig commands. Now you can check the IP address using the ipconfig command, release and renew the IP address using the ipconfig /release and ipconfig /renew commands, display or reset/refresh DNS using ipconfig /displaydns and ipconfig /flushdns commands, etc.

If you have any other computer problems, please visit the official MiniTool software website. (The last sentence must be modified or deleted according to the actual situation)

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