Microsoft DOS ipconfig command /flushdns

Windows 2000 and XP syntax

ipconfig [/? | /all | /release [adapter] | /renew [adapter] | /flushdns | /registerdns | /showclassid adapter | /setclassid adapter [classidtoset] ]

/all	Display full configuration information.
/release	Release the IP address for the specified adapter.
/renew	Renew the IP address for the specified adapter.
/flushdns	Purges the DNS Resolver cache.
/registerdns	Refreshes all DHCP leases and re-registers DNS names
/displaydns	Display the contents of the DNS Resolver Cache.
/showclassid	Displays all the dhcp class IDs allowed for adapter.
/setclassid	Modifies the dhcp class id.

Internet Properties	inetcpl.cpl
IP Configuration (Display Connection Configuration)	ipconfig /all
IP Configuration (Display DNS Cache Contents)	ipconfig /displaydns
IP Configuration (Delete DNS Cache Contents)	ipconfig /flushdns
IP Configuration (Release All Connections)	ipconfig /release
IP Configuration (Renew All Connections)	ipconfig /renew
IP Configuration (Refreshes DHCP & Re-Registers DNS)	ipconfig /registerdns
IP Configuration (Display DHCP Class ID)	ipconfig /showclassid
IP Configuration (Modifies DHCP Class ID)	ipconfig /setclassid

The default is to display only the IP address, subnet mask and default gateway for each adapter bound to TCP/IP.

For Release and Renew, if no adapter name is specified, then the IP address leases for all adapters bound to TCP/IP will be released or renewed.

For SetClassID, if no class id is specified, then the classid is removed.

Examples:

C:\Users\user>ipconfig /flushdns

Windows IP Configuration

Successfully flushed the DNS Resolver Cache.




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