01-05-2010 08:24 PM
There us an entire volume in JUNOS documentation dedicated to CoS. There is quite alot to know about it. I find that one of the best material out there that gives some practical CoS related configurations and information is the book:
JUNOS Enterprise Routing: A Practical Guide to JUNOS Software and Enterprise Certification. Here's an Amazon.com link for the book I am talking about.
Having said that, presently SRX does not support queuing and scheduling for traffic across VPNs. There are already Enhancement Requests opened to look into supporting this in future release. I'd recommend checking with your Juniper Sales contact to find out status of future support for this feature.