[LARTC] Traffic Shaping over Satellite Internet

["Randy Wallace" <randywallacejr@gmail.com>]

I've set up Traffic Shaping on a Linux Router.
Using HTB with SFQ, i'm trying to slow down
heavy downloading for 20 subscribers over
a 2048 kbit downlink.  I'm classifying internet related
traffic using iptables marking.

bri0 is my local lan bridge, receiving egress traffic destined for subscribers.

tc qdisc add dev bri0 root handle 1: htb default 2
tc class add dev bri0 parent 1: classid 1:1 htb rate 92129kbit ceil 102400kbit
tc class add dev bri0 parent 1:1 classid 1:2 htb rate 90072kbit ceil 92129kbit
tc class add dev bri0 parent 1:1 classid 1:3 htb rate 2048kbit ceil 92129kbit
# Non-Internet Local Lan Traffic
tc qdisc add dev bri0 parent 1:2 handle 2: sfq perturb 10
# Internet Traffic
tc class add dev bri0 parent 1:3 classid 1:9 htb rate 50kbit ceil 100kbit
# Unknown Internet Traffic
tc qdisc add dev bri0 parent 1:9 handle 9: sfq perturb 10
# Known Subscribers, based on IP Address, ea. subscriber gets their own class,
# starting with 1:10 (a script populates the classes for me)
tc class add dev bri0 parent 1:3 classid 1:(10->X) htb rate 100kbit ceil 400kbit
tc qdisc add dev bri0 parent 1:(10->X) handle (10->X): sfq perturb 10

Then the classifier:
# Send Internet traffic, marked 3, to Class 1:3
tc filter add dev bri0 protocol ip parent 1: prio 1 handle 3 fw flowid 1:3
# Send traffic, based on dest. IP to their corresponding classes
tc filter add dev bri0 protocol ip parent 1: prio 1 u32 match ip dst
10.200.0.(2->X)/32 flowid 1:((2->X) + 10)

Does this look like a good solution?  Can this really slow down heavy downloads,
so all subscribers can at least get ..some.. traffic?  Does traffic
shaping, not
policing, also drop packets when a HTB class exceeds it's rate, or does it just
wait until there are enough tokens?

Thank you for any guidance..
Randy
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