310 CHAPTER 11 WORKING WITH TCP/IP
The following list describes each of the command line arguments.
-f Clears the routing table of all gateway entries. Using this command line switch with one of
the commands clears the routing table before the utility executes the command. For example, if
you add a new entry, then the routing table will contain just that entry when the utility finishes
its work. This command line switch doesn??™t affect host routes (those with a netmask of 255.255
.255.255), loopback routes (those with an IP address of 127.0.0.0), or multicast routes (those with
an IP address of 224.0.0.0 and a netmask of 240.0.0.0).
-p Makes a route persistent across boots of the system when used with the ADD command.
The system normally doesn??™t preserve routes when you restart the system and rediscovers the
routes during the boot process. The Route utility ignores this command line switch for all other
commands. You can??™t use this command line switch with older versions of Windows (most
notably, Windows 95). Windows stores permanent routes in the HKEY_LOCAL_MACHINE\SYSTEM\
CurrentControlSet\Services\Tcpip\Parameters\PersistentRoutes registry key.
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