soft-cap,

[Michael Spratt]

Dear friends,  linux/ipfw/dummynet/transparent-bridge, am trying to cap 
users to upload/TX rates, but allow them to go over if the link is not 
congested.

The example below limits each src-ip mask-IP's TX from 10.10.0.0/20 to 
128Kbp/s,  and from 10.20.0.0/20 to 1024Kbp/s.
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ipfw pipe 1 config bw 128Kbit/s mask src-ip 0xffffffff
ipfw pipe 2 config bw 1024Kbit/s mask src-ip 0xffffffff
ipfw 10001 add pipe 1 ip from 10.10.0.0/20 to any out xmit br0   
ipfw 10001 add pipe 2 ip from 10.20.0.0/20 to any out xmit br0   
?How to define total link size 100/100Mbit/s and allow individual ip's 
to exceed rate limit when link is not full?
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This simply places a HARD CAP on each IP. 

My question is, how to allow each IP to exceed that hard limit if the 
bandwidth on the up-link is available.  IE. If there is free bandwidth  
let them use it; if not scale users exceeding their subscibed data rate 
down until they are down to their subscribed limit?

My WAN uplink is 100Mbp/s
I want to give the clients the benefit of exceeding their TX dynamic 
pipe cap-limit,  when the system has spare bandwdith.

I welcome any feedback. Thanks -Mike 1-214-901-3232