tools for traffic engineering networks

[Vicky Rode]

Hi there,

I'm curious to know what tools (in traffic engineering arena) people use 
in order to manage and verify their service assurance that they are 
providing and / or receiving they think they are.

How do you know the policers are functioning correctly?

How do you know whether your service provider and / or your internal 
traffic is not being over-book?

Any recommendations, thoughts, white papers, pointers will be greatly 
appreciated.

regards,
/vicky