"tc" is what you want - honest.

The documentation could be more straight forward.

The HTB is the tool that does what most people really want from a shaper.

Here we divide up a 2Mbps line leading to some webservers and email servers into chunks (buckets), each bucket gets so much bandwidth guaranteed, and each IP address is then assigned to a bucket, and then put some perturbation on the dross.

Note these limits can only apply to outgoing traffic. Read the LARTC docs for explanation of why.

The result is that each IP address is guaranteed its share of the bandwidth when things get congested. But otherwise can consume upto 2Mbps.

I had to edit out most of the content as it private to my employers. Be assured the buckets add up to 2Mbps. The documentation says you have to reduce the total slightly below the 2Mbps limit, so the congestion occurs in the shapers queues, not the routers, but I found it worked fine (but do test this bit - presumably Eurobell gave us a little bit more).

I'm sure one can get more details into the control. In our case all we cared was that no service, especially customers services, got starved of resource by another, so per IP address was fine.

My init scripts looks a bit like this...

DEVICE=eth0

RATE=2048kbit

SHARE1=128kbit
SHARE2=384kbit
SHARE3=512kbit
SHARE4=768kbit
SHARE5=1024kbit

# Buckets reflect IP last Octet for now
BZYNET=7
BCLUSTER6=46
BINTERNAL=69
BDEFAULT=255

start (){

# Create QDISC using HTB
tc qdisc add dev $DEVICE root handle 1: htb default $BDEFAULT
tc class add dev $DEVICE parent 1: classid 1:1 htb rate $RATE ceil $RATE

# Create Buckets
tc class add dev $DEVICE parent 1:1 classid 1:$BCLUSTER6 htb rate $SHARE5 ceil $RATE
tc class add dev $DEVICE parent 1:1 classid 1:$BINTERNAL htb rate $SHARE1 ceil $RATE
tc class add dev $DEVICE parent 1:1 classid 1:$BZYNET htb rate $SHARE3 ceil $RATE
tc class add dev $DEVICE parent 1:1 classid 1:$BDEFAULT htb rate $SHARE1 ceil $RATE

# Each IP address is put in a bucket.....

tc filter add dev $DEVICE protocol ip parent 1:0 prio 1 u32 match ip src 10.10.10.7 flowid 1:$BZYNET
# Repeat as needed changing IP and the Bucket name


# Make the dross play nicely using SFQ
tc qdisc add dev $DEVICE parent 1:$BDEFAULT handle 10: sfq perturb 10
}

stop()
{
# Delete the root of the tree to get a pfifo_fast back
tc qdisc del dev $DEVICE root
}

status()
{
echo ==== QDISC STATS =====
tc -s qdisc
echo ==== CLASS STATS =====
tc -s class show dev $DEVICE
}