1. OPENSIG 2002 1 Bob Lindell A Two-Level Architecture for Internet Signaling Bob Lindell Bob Braden Computer Networks Division USC/ISI

2. OPENSIG 2002 2 Bob Lindell RSVP Reuse  MPLS  VPN Provisioning  Optical Network Path Setup  Link Layer QoS Setup  TIST  AFSP

3. OPENSIG 2002 3 Bob Lindell Two Level Architecture  ALSP – Application Layer Signaling Protocol  End-to-End Semantics  RSVP, MPLS, …  CSTP – Common Signaling Transport Protocol  Hop-by-Hop Semantics  Transport, Security, State Management, Demultiplexing

4. OPENSIG 2002 4 Bob Lindell Decompose Functionality  Path (Tree) Oriented Signals  Object Based Message Format  Soft State  Multicast Security  Reliable Multicast Transport (Congestion Control, Ordered Delivery)  Fragmentation and Message Bundling  Tunneling  Transport without Reliability Mechanisms

5. OPENSIG 2002 5 Bob Lindell CSTP Downcalls  SendNewSAPU  Reliably deliver a new soft state entities and initiate refreshes  SendModSAPU  Reliably deliver a modification of an existing soft state entities  SendTearSAPU  Reliably deliver a soft state deletion request  SendEventSAPU  Reliably deliver a stateless message  SendInfoSAPU  Send a stateless message without reliability or refreshes

6. OPENSIG 2002 6 Bob Lindell CSTP Upcalls  SendFail  Asynchronous error notification  RecvNewSAPU  Receive new soft state entities  RecvModSAPU  Receive modifications of new soft state entities  RecvTearSAPU  Receive deletions of soft state entities  RegenSAPU  Request for ALSP layer to regenerate a subsequent refresh

7. OPENSIG 2002 7 Bob Lindell Waypoint  An incremental approach to realizing CSTP (3 layers?)  Remove complex (Transport) features  Soft State  Reliable Transport  Bundling  More like a IP/IPSEC/UDP for signaling  Demultiplexing  Options  Checksum  Security

8. OPENSIG 2002 8 Bob Lindell Documents  A Two-Level Architecture for Internet Signaling  Waypoint – A Path Oriented Delivery Mechanism for IP based Control, Measurement, and Signaling Protocols  http://www.isi.edu/rsvp/pub.html

9. OPENSIG 2002 9 Bob Lindell Beyond Signaling  Path Oriented Network Management  Traceroute, Pathchar  Topology Mapping

10. OPENSIG 2002 10 Bob Lindell Conclusion  Lessons learned could be applied to an RSVPv2  Much broader applicability with all the new path oriented signaling protocols  IETF NSIS working group  Should we get there incrementally?  There are interesting Path Oriented Network Management functionality yet to be explored