> As far as I can tell on a quick scan, IPTOS_LOWDELAY only affects
> ppp*, sl*, strip*, anyone using if_spppsubr.c, and some kind of
> serial(?) h/w driver (hd64570.c--what is this?  How could I really
> find out except to ask the author?).
	hd64570 is a synchronous serial chip.  useful for anything that
wants to do HDLC, and sppp, and whatever.  It's got some problems (like
being hardwired into TCP/IP and some limits on the size of packets.) that I
was working on awhile ago but haven't recently.

eric