Changing interface names in pppd, where is the ifname option?

[Josef Wolf]

On Tue, Mar 24, 2009 at 10:19:27PM -0300, Derek Broughton wrote:
> H.S. wrote:
> 
> > Josef Wolf wrote:
> >> 
> >> I have multiple ADSL lines running ppp.  This works fine except of
> >> one problem:  The interface names keep changing.  Sometimes the first
> >> line is on ppp0, sometimes it is on ppp1, sometimes on ppp2, and so
> >> on.  The same happens for the second line too.
> >> 
> >> I see that pppd in other distros has the "ifname" option to assign
> >> a stable interface name for a given peer.  This option seems not to
> >> exist in ubuntu's pppd.
> 
> It shouldn't be needed, because interface naming is handled by udev.

So how do I tell udev to name the device based on the provider name?