>>> [...]
>> couterexample: if you put multiple interface into single ethernet
>> broadcast domain, [...].  for ppp interface I feel it much easier to
>> borrow interface ID from other interfaces (as there's no possibility
>> of having two interface into the same ppp domain).
>I don't see why not: two modems and two dialup sessions, for example,
>for double the bandwidth....

	if you are connected two the same RAS using two ppp sessions,
	do these ppp interfaces (ppp0/1) share the same broadcast domain?
	i believed not.

	RAS box
	 |ppp0|ppp1
	my netbsd machine

itojun