Release and Renew IP Address (2020 How-To Instructions)

Written by Valdis Koks

Release and Renew IP address to resolve connectivity issues

Release/Renew IP address stands for a process that can assist to resolve network connectivity problems. It can be accomplished by means of the Command Line on Windows or System Preferences on Mac OS. Release and Renew IP address implies reassigning the lease of DHCP IP address of the host device and stating a request for a new IP address. In the first place, the ipconfig /release command is applied to reassign the current IP lease and transmit the server a DHCP alert to notify the old IP address as vacant. The second command – ipconfig /renew asks for a new IP address.

The aforesaid commands assist to solve network connectivity issues that occur due to the expired IP addresses or other insignificant system malfunctions. It can assist to resolve IP-related troubles and recover a fully-functioning network connection immediately.
After the Release/Renew IP commands, the Flush DNS command normally follows, which cleans DNS cache and submits requests to apply new IP address details.

Follow the tutorial set forth below to release and renew ip address on Windows 10, 8, 8.1, 7, Vista, XP, Mac and Linux devices. Be sure that your network adapter is poperly set to Obtain IP address automatically, otherwise the aforesaid commands won’t function as they should.

How to Release and Renew IP Address on Windows, Mac, Linux

Windows 10, 8.1 and 8

To release and renew IP address on Windows 10, 8.1 or 8, implement the milestones provided below.

  1. In Windows 10, 8 or 8.1, apply Windows search to locate Command Prompt.
  2. Right-click on Command Prompt and choose Run as Administrator command. Command Prompt - Run as Administrator
  3. In User Account Control window, choose Yes.
  4. In CMD, specify ipconfig /release and hit Enter.
  5. Afterwards, specify ipconfig /renew and hit Enter. ipconfig /release
  6. Take time until the DHCP server sets a new IP address for your device.

Windows 7 and Vista

Refer to these milestones to apply ipconfig /release and ipconfig/renew commands on Windows 7 or Vista.

  1. Go to Windows menu, afterwards specify cmd in Windows search field.
  2. Right-click on the Command Prompt area and select Run as Administrator in the menu. cmd Windows 7
  3. In User Account Window, select Yes.
  4. At this point, type the following command in the Command Prompt: ipconfig /release and hit Enter.
  5. Specify ipconfig /renew and hit Enter. ipconfig /renew

Mac OS

  1. Go to the Apple logo in the upper-left area of the screen and choose System Preferences. Apple System Preferences
  2. At this point, proceed to Network. Apple Network
  3. In the left area, choose Wi-Fi or Ethernet (based on which one you’re applying). Afterwards select Advanced… button on the right area of the Network menu. Apple Wi-Fi Advanced
  4. Choose TCP/IP tab. At this point, you may notice that Configure IPv4 is tuned to Using DHCP. Select Renew DHCP Lease button.
  5. Take time until you notice a change in IPv4 address. The process is fully accomplished.

Linux/Ubuntu

The tutorial below gives an identical example of ipconfig /release and ipconfig /renew commands on Linux. Follow these milestones to encourage DHCP Client to Renew IP Address.

  1. Use the CTRL+ALT+T hotkey to open Terminal on Linux.
  2. In Terminal, specify sudo dhclient – r and hit Enter to vacate the present IP.
  3. Afterwards, specify sudo dhclient and hit Enter to obtain a new IP address via DHCP server.Linux/Ubuntu sudo dhclient – r

Useful DNS Resolver Commands for Windows

Apart from the Renew and Release IP commands, you might have to or require to apply some of the commands mentioned below.

  1. ipconfig /flushdns. Such command assist in clearing the DNS Resolver cache to make sure that the new IP data is fetched immediately.
  2. ipconfig /registerdns. Such command refreshes all available DHCP leases and subsequently registers DNS names from the very beginning.
  3. ipconfig /displaydns. Indicates available contents located in DNS Resolver Cache.

Fix IPconfig release renew not working

IPConfig /Release and /Renew commands function only in case your network adapter is tuned to call out the IP address automatically. To say it otherwise, you ought to have DHCP activated. You can set these parameters by means of Windows Network and Sharing Center.

  1. Proceed to Network and Sharing Center, afterwards choose Change adapter settings.
  2. Right-click your network adapter and start Properties.
  3. Locate Internet Protocol Version 4 ( TCP /IPv4) and choose Properties.
  4. Choose Obtain IP Address automatically and select OK to apply changes.

About the author

Valdis Koks

Security engineer, reverse engineering and memory forensics

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