On Thu, Jan 15, 2004 at 03:07:20PM -0500, Robert Watson wrote: > > On Thu, 15 Jan 2004, Vlad Galu wrote: > > > |On Tue, 13 Jan 2004 [EMAIL PROTECTED] wrote: > > | > > |> How does one create a dummy network interface in FreeBSD? > > | > > |Dummy in what sense? An interface where the packets are simply > > |dropped? if_tap and if_tun both provide pseudo-device in /dev that a > > |userspace process can attach to in order to emulate a network interface > > |(used by VMWare, ppp, various tunneling bits, ...) In the absense of a > > |process sitting on the device, they simply drop the packets. Although > > |they may get garbage-collected if unused on -CURRENT... You can also > > |use netgraph to bring pseudo-interfaces, perhaps without anywhere for > > |packets to go. > > | > > |And, I suppose, create in what sense? Are you looking at this from a > > |developer perspective, or you just need one from a user perspective. > > |If writing a device driver (and hence needing a starting point), if_tap > > |and if_tun are fairly decent models for a pseudo-interface. > > > > I think he could use the discard interface smoothly. On Linux > > (from which the dummy interface notion is taken from) it is simply used > > for testing purposes, as in routing, or perhaps socket programming. I > > personally have used it for a while, but then I used interface aliasing, > > which became a habit. > > Does the discard interface in Linux "act like" another type of interface, > such as point-to-point, ethernet, etc?
I believe that he was referring to the discard interface in FreeBSD. I
don't know about Linux at all, but I have used the discard interface in
a FreeBSD router much like a Null interface in a cisco router.
pseudo-device disc
man 4 disc
--
Mike
perl -e 'print unpack("u","88V]N=&%C=\"!I;F9O(&EN(&AE861E<G,*");'
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