Incorrectly editing the registry may severely damage your system. User-specified settings take precedence over computer settings, and command-line options take precedence over registry settings. Use the value for white space, because it isn't a valid control character. To set the REG_DWORD value, run Regedit.exe and use the hexadecimal value of a control character for a particular function (for example, 0×9 is TAB and 0×08 is BACKSPACE). HKEY_CURRENT_USER\Software\Microsoft\Command Processor\PathCompletionChar\REG_DWORD HKEY_CURRENT_USER\Software\Microsoft\Command Processor\CompletionChar\REG_DWORD HKEY_LOCAL_MACHINE\Software\Microsoft\Command Processor\PathCompletionChar\REG_DWORD HKEY_LOCAL_MACHINE\Software\Microsoft\Command Processor\CompletionChar\REG_DWORD You can enable or disable file and directory name completion for all processes of the cmd command on a computer or for a user logon session by setting the following REG_DWORD values: To add a static arp cache entry that resolves the IP address 10.0.0.80 to the physical address 00-AA-00-4F-2A-9C, type: arp /s 10.0.0.Users seeking more advanced capabilities are encouraged to explore PowerShell for enhanced scripting and automation. To display the arp cache table for the interface that is assigned the IP address 10.0.0.99, type: arp /a /n 10.0.0.99 To display the arp cache tables for all interfaces, type: arp /a To create permanent static arp cache entries, place the appropriate arp commands in a batch file and use Scheduled Tasks to run the batch file at startup. The entries are removed if the TCP/IP protocol is stopped and started. The physical address for etheraddr consists of six bytes expressed in hexadecimal notation and separated by hyphens (for example, 00-AA-00-4F-2A-9C).Įntries added with the /s parameter are static and do not time out of the arp cache. The IP addresses for inetaddr and ifaceaddr are expressed in dotted decimal notation. To add a static arp cache entry to the table for a specific interface, use the ifaceaddr parameter where ifaceaddr is an IP address assigned to the interface. To delete all entries, use the asterisk (*) wildcard character in place of inetaddr.Īdds a static entry to the arp cache that resolves the IP address inetaddr to the physical address etheraddr. To delete an entry in a table for a specific interface, use the ifaceaddr parameter where ifaceaddr is the IP address assigned to the interface. To display the arp cache table for a specific interface, use the /n ifaceaddr parameter in conjunction with the /a parameter where inetaddr is the IP address assigned to the interface.ĭeletes an entry with a specific IP address, where inetaddr is the IP address. If inetaddr is not specified, the first applicable interface is used. To display the arp cache entry for a specific IP address, use arp /a with the inetaddr parameter, where inetaddr is an IP address. Syntax arp ] ] ] ]ĭisplays current arp cache tables for all interfaces. Used without parameters, arp displays help information. There is a separate table for each Ethernet or Token Ring network adapter installed on your computer. The ARP cache contains one or more tables that are used to store IP addresses and their resolved Ethernet or Token Ring physical addresses. Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012ĭisplays and modifies entries in the Address Resolution Protocol (ARP) cache.
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