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

[Josef Wolf]

Hello,

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.

What happened to this option?  Is there any other way to get stable
interface names in ubuntu?