Bildos said:
When I'd like to delete ARP cache by: arp -d *
I recived: the arp entry deletion failed: 87
any ideas ?
That wasn't a very helpful error message from arp!
in WinError.h, error
87 is ERROR_INVALID_PARAMETER - which is pretty misleading (or wrong) for
this situation.
I believe you're actually getting the error because you don't have the
administrative privileges required to purge the cache. Right-click the
Command Prompt icon in Start Menu, and choose "Run as Administrator". Give
your consent to the UAC prompt. Now you have an Administrator command
Prompt - in the title bar, it will actually say "Administrator: Command
Prompt" (as opposed to just plain "Command Prompt").
Now run "arp -d" again. This time it should work.
I usually leave an Administrative prompt running in the background, so I can
quickly run utilities with elevation.
Hope it helps,