Juniper (NetScreen) Firewall - How to configure a traffic shaping policy

1.       You can create a high priority traffic policy for specific
traffic. Please refer following document:
http://Kb.juniper.net/KB4201

2.       You should set the external interface bandwidth to match the internet
pipe (even if there's another 100mbit router hop). Setting up BW greater than or lower than the actual BW can cause
drop in packets due to calculation mismatch. This is how the fw knows what the external limit is.

keywords: bandwidth shaping, QoS, bandwidth limit, guaranteed bandwidth, ScreenOS