i''ve got a problem with bounded and unbounded classes using cbq. i want to create two classes for my outbound network connection, one for the normal data and one only for ack-packets: tc qdisc add dev ppp0 root handle 1: cbq bandwidth 10Mbit avpkt 1000 mpu 64 tc class add dev ppp0 parent 1:0 classid 1:1 cbq bandwidth 10Mbit rate 768kbit allot 1514 weight 76.8kbit prio 8 maxburst 20 avpkt 1000 bounded tc class add dev ppp0 parent 1:1 classid 1:2 cbq bandwidth 10Mbit rate 16kbit allot 1514 weight 16kbit prio 1 maxburst 20 avpkt 1000 tc class add dev ppp0 parent 1:1 classid 1:3 cbq bandwidth 10Mbit rate 112kbit allot 1514 weight 11.2kbit prio 7 maxburst 20 avpkt 1000 [bounded] [...] with 1:3 set to bounded this works perfectly and i get ~90kb/s downstream with an upload running at the same time. BUT i dont want to limit class 1:3 if class 1:2 has excess bandwidth. i thought it should be enough to remove the ''bounded'' from class 1:3 to share excess bandwidth from class 1:2. but if i do so, class 1:3 uses bandwidth of class 1:2 even if no excess bandwidth is available from 1:2. 1:3 is simply ''stealing''. without the ''bounded'' i get ~25kb/s downstream if i upload. and this means not all ack-packets have been sent as fast as possible, regardless that the ack-class has the highest priority. anyone got an idea what i''ve done wrong? thanks in advance Patrick Nagelschmidt