The ipconfig command supports the command-line switch/all. This results in more detailed information than ipconfig alone.
An important additional feature of ipconfig is to force refreshing of the DHCP IP address of the host computer to request a different IP address. This is done using two commands in sequence. First, ipconfig /release is executed to force the client to immediately give up its lease by sending the server a DHCP release notification which updates the server's status information and marks the old client's IP address as "available". Then, the command ipconfig /renew is executed to request a new IP address.[3][4] Where a computer is connected to a cable or DSL modem, it may have to be plugged directly into the modem network port to bypass the router, before using ipconfig /release and turning off the power for a period of time, to ensure that the old IP address is taken by another computer.[5]
The /flushdns parameter can be used to clear the Domain Name System (DNS)[6] cache to ensure future requests use fresh DNS information by forcing hostnames to be resolved again from scratch.[7])
Apple macOS
ipconfig in Mac OS X serves as a wrapper to the IPConfiguration agent, and can be used to control the Bootstrap Protocol and DHCP client from the command-line interface.[8] For example, you can release and renew an IP address if it happened to be assigned incorrectly by the DHCP server during the automated assignment process.[9] Like most Unix-based operating systems, Mac OS X also uses ifconfig for more direct control over network interfaces, such as configuring static IP addresses. The Ifconfig command in Linux has been replaced by the IP command
