Refer to this excellent tutorial on QoS to answer your questions: "Internet QoS: A Big Picture" by Xipeng Xiao and Lionel M. Ni. IEEE Network. March/April 1999. Alex. Nguyen Thi Mai Trang wrote: > Hi everybody, > > I have a question about the notion of SLA (service level agreement) in Intserv/RSVP but I don't know where to post it > because the group Intserv is no longer active. > > It seems that the notion SLA was born in Diffserv architecture. The SLA is necessary because network resources are > statically provisioned. It's very clear. > > In Intserv/RSVP, I don't find the SLA/SLS (service level specification) concept in all concerning draft/RFCs . I > wonder if there is no SLA/SLS concept in Intserv/RSVP, how we can make policy decision in Intserv/RSVP. > > Some clarifications: > In Intserv/RSVP, client uses RSVP to request resource in the routers. The routers verify if it has sufficiently > resources (Admission control) and the user has the right to request this amount of resource (Policy control) or not. > If both are positives, it makes the resource reservation for this flow. My question is that if there is no SLA/SLS, > how the network can answer (using COPS-RSVP for example) to the question "Does this client has the right to request > such a reservation ?" ? > > Thank you very much, > Mai Trang