1. Copyright © 2006 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 1 draft-penno- message-flows-02 Reinaldo Penno, Daryl Malas, Adam Uzelac, Sohel Khan

2. 2 Copyright © 2006 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Goal  Provide reference message flows for the most common peering scenarios  Differently from the SIP call flows RFC/drafts, this document provides more context and discussions around message flows. Peering models QoS Media handling Policy Enforcement etc

3. 3 Copyright © 2006 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Common Peering Message Phases Discovery: DNS queries, Federation DNS, Manual configuration, etc Security Establishment: TLS, Access Lists, IPSec, Registrations, etc SIP Signaling Exchange: SIP over UDP/TCP/others SIP Policy, Domain or Federation Exchange: SIP Subscribe/Notify, etc SIP Media Flows: Media Relays, QoS

4. 4 Copyright © 2006 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Taxonomy of Peering Scenarios and Associated Message Flows SIP Policy Exchange SIP Policy, Domain & Federation exchange Media Relays, Transcoding Media Flows SIP Over UDP/TCP  SIP over UDP/TCP Signaling Access Lists, IPSec, physical segregation, etc TLS, Registrations, etc Security Manual configurationDNS, others dynamic methods Discovery StaticOn-Demand Policy, Domain Exchange

5. 5 Copyright © 2006 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Example Message Flow

6. 6 Copyright © 2006 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net Moving forward  Incorporate/refine existing message flows and introduce new message flows related to federations and others  Align terminology and requirements with new documents  Adopt it as a WG document