pppoe reliability

[cknipe at savage.za.org]

Quoting "Michael P. Soulier" <msoulier at digitaltorque.ca>:
> I've noticed that when I drop ppp, the tun0 seems to hang on a bit. If
> I restart too quickly, I get a tun1. The ifconfig command will not
> permit me to destroy tun0 either, so I wait for a little while before
> bringing it back up again.

In the ppp.linkdown 
mylabel:
 iface clear

That will clear the interface and also remove the address when the PPPoE goes
down.