1. DiffServ QoS model (RMD) A. Bader, G. Karagiannis

2. Current DiffServ Traffic differentiation Admission/policy control at the borders, simpler functions in the interior nodes No QoS signaling within the domain RMD QoS signaling within the DiffServ domain and can be extended to multi-domain Provides dynamic QoS support, better link utilization Scalable (complexity at edge, simple in interiors)

3. DiffServ QoS signaling model RMD in NSIS Edge Interior Edge DiffServ domain Interior: No per flow states: only per PHB states and no NTLP states Local QSpec: bandwidth + control flags Per flow NTLP and NSLP states QSpec: token bucket or more complex descriptors End Per flow NTLP and NSLP states

4. Reduced state operation model of NSIS IP QoS- NSLP E2E QoS model NTLP User application IP NTLP IP NTLP/D-mode IP NTLP IP NTLP User application Initiator Receiver Edge Interior E2E QoS model Local-QoS E2E QoS model Local-QoS NTLP and NSLP per- flow states NTLP stateless per- class or no NSLP states QoS- NSLP NTLP and NSLP per- flow states NTLP and NSLP per- flow states NTLP and NSLP per- flow states

5. RMD QSpec Bandwidth or number of resource units Additional control information (fields and flags) as a consequence of the stateless operation: TTL, M, S, etc. Question: Should we continue working on RMD model as a WG draft towards inf. or exp. RFC?

6. Successful reservation Initiator ReceiverEdge Interior Resv(QSpec) Resv(E2E ignore, QSpec) Resv(QSpec) Resv(LQSpec) Response

7. Failed reservation Initiator ReceiverEdge Interior Resv(QSpec) Resv(E2E ignore, QSpec) Resv(LQSpec) Resv(LQSpec:M-marked) Response: Congestion rep. Response Resv(LQSpec:M-marked) Unsuccesful resv. Resv(Tear) Resv(Tear, TTL=1)

8. Severe congestion handling by data marking Initiator ReceiverEdge Interior User Data Data: S-marked Resv(Tear) Response: Congestion rep. Severe congestion Resv(Tear)

9. Aggregation types RSVP aggregation-like –topology dependent (aggregation of flows between aggregation points) –aggregation per DSCP –statefull nodes –aggregated refreshes RMD-like –topology independent, aggregation per DSCP only –statefull edges, stateless interior –per flow refreshes Combination of the two types