On Wed, May 17, 2000 at 09:31:24PM +0100, Carlos Morgado wrote:
> On Wed, May 17, 2000 at 09:40:32AM -0700, Ivan Passos wrote:
> >
> > Hello,
> >
> > Quick question: is it possible to have unnumbered IP interfaces in Linux??
> >
> > An unnumbered IP interface uses another if's IP in case it needs one (e.g.
> > a unnumbered PPP if may use the Ethernet IP).
> >
>
> What are you trying to do ? afaik unnumbered ifs are mostly useless except
> for bundling and bgp load share tricks. You probably want to look at the
> multilink ppp and isdn master/slave stuff.
If the box is a router and not generating any traffic (or at least very little
traffic), point-to-point interfaces don't need an address... or in the case that
they do generate traffic (ICMP unreach, etc) then they can use the address of
another interface as configured.
Just one way of reducing address-space wastage
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