ALTQ: ALternate Queueing -- uses "queues" for bandwidth allocation, traffic shaping
class based (cbq) - per cent, (K,M)bytes, or
priority based (PRIQ)
hierarchical (HFSC)
Syntax:
altq on interface type [options ... ] main_queue { sub_q1, sub_q2 ..}
queue sub_q1 [ options ... ]
queue sub_q2 [ options ... ]
[...]
pass [ ... ] queue sub_q1
pass [ ... ] queue sub_q2