so I found this guide
http://www.howtoforge.com/voip_qos_t...oute2_asterisk

I want use bridge util and tc to always give priority to sip the guide above is for iax

sip uses 5060 10,0000 20,000 udp basicly I want to create a device that can be dropped in and will automatically shape and queue sip traffic and give priority to sip over anything else

any help on this will be useful thanks

I also found this which I think is really close to what I want to do
http://www.voip-info.org/wiki/view/QoS+Linux
http://mirror.su.lt/voip-info/wiki/v...with+HFSC.html

so I guess my real question is what are these command doing?

# add HFSC root qdisc
tc qdisc add dev $DEV root handle 1: hfsc default 10

# add main rate limit class
tc class add dev $DEV parent 1: classid 1:1 hfsc sc rate ${RATEUP}kbit ul rate ${RATEUP}kbit

# keep it simple: two classes only
tc class add dev $DEV parent 1:1 classid 1:10 hfsc sc umax 1500b dmax 53ms rate 40kbit ul rate ${RATEUP}kbit
tc class add dev $DEV parent 1:1 classid 1:11 hfsc sc umax 1500b dmax 30ms rate 80kbit ul rate ${RATEUP}kbit




and how could I adjust the rates below for a link that is 20mbits/ 20mbits ?

1500b dmax 53ms rate 40kbit ul rate ${RATEUP}kbit