rc.conf - setting interface UP without IP-address?

Ewald Jenisch a at jenisch.at
Wed Aug 31 11:41:06 GMT 2005

On Wed, Aug 31, 2005 at 02:41:45PM +0300, Rein Kadastik wrote:
> Excuse me for a silly question, but what the hell is UP? I know, what is 
> IP, I know how ifconfig works, but wtf is UP?

UP is the state of the interface. You can set an IF up/down to
enable/disable the IF. Current state of an interface can be seen with
ifconfig, e.g.


Normally an interface is automatically taken up when you give it an


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