1. Update on the Internet Research Task Force Aaron Falk IRTF Chair IETF-73 – Minneapolis

2. IETF-73 -- Minneapolis2 IRTF Status Four Research Groups (RGs) are meeting this week –Internet Congestion Control RG –Delay Tolerant Networking RG –Routing RG (Fri) –Host Identity Payload RG (Fri) –Mobility Optimizations RG Reviewing a rebooting Peer-to-Peer RG with the IAB (tomorrow) IRSG composition is now public (on IRTF Chair page)

3. IRTF Status Finalized definition of the IRTF RFC Stream –Enqueued at the RFC Editor 4 IRTF RFCs published –3 from DTNRG on Licklider Transmission Protocol –NMRG on SNMP Measurements draft-irtf-asrg-dnsbl –Lengthy thread on IETF list –To be published as an IRTF RFC on current practice –Will include Security Considerations reflecting IETF last call comments –Interest in IETF work on reputation services will be raised in DKIM tomorrow IETF-73 -- Minneapolis3

4. A brief diversion into something other than status…

5. 2 minute intro to the Delay-Tolerant Networking Research Group DTNRG Slides courtesy of: Kevin Fall, Intel Research Stephen Farrell, Trinity College Dublin Lloyd Wood, Cisco

6. Multi- path USB Delay Tolerant Networking NET ( DSL ) DTNAgent NET wireless SENDER APP RECEIVER APP Network Store-carry-forward of messages Multi-party comms model Features Extensible (URI-based) naming Supports multi-path routing and caching with e2e disruptions 6 DTNAgent NET CACHE DTNAgent IETF-73 -- Minneapolis

7. Internet Stack 7 Router Host Application Transport Network Data Link Physical No significant buffering here Hosts always run IP and up Needs each type of physical link Loss of link  loss of path (and possibly loss of useful work) IETF-73 -- Minneapolis

8. DTN Stack 8 DTN Router Host Non-IP Host Application Transport Network Data Link Bundle Physical Intermittent Link Conventional Router Custody Transfer Storage: helps to tolerate e2e disruption Non-IP InternetIP Internet IETF-73 -- Minneapolis

9. Delay-Tolerant Networking RG: Bundle Protocol now tested in space Code uploaded to the UK-DMC Disaster Monitoring Constellation satellite operated by Surrey Satellite Technology Ltd (SSTL). SSTL, Cisco Systems and NASA Glenn tested this by downloading a 150MB fragmented image of the Earth using the Bundle Protocol (BP). NASA JPL have also just done an experiment with DTN that involved using the BP and the Licklider Transmission Protocol (LTP) out to a distance of 15-25 million km! They'll be reporting results on that at Thursday’s DTNRG session. TIME Magazine call DTN one of the best inventions of the year. The image transfer testing was cited in that article. (#9 Orbital Internet, 10 November 2008 issue.) Internet 15-25 million km 700 km IETF-73 -- Minneapolis9

10. 2 minute intro to the Peer-to-Peer Research Group P2PRG Slides courtesy of: Volker Hilt, Bell Labs Stefano Previdi, Cisco

11. Peer-to-Peer Networks Symmetric relationship between hosts –Either can be client or server (seem familiar?) Distributed Scales to large numbers of nodes & users Autonomous Support anonymity Old P2P systems: USENET, BGP New P2P systems: BitTorrent, Skype New uses –Realtime video, OS update distro IETF-73 -- Minneapolis11

12. P2P Research Questions Consideration of network structure (beyond ALTO) Security, privacy, anonymity and trust. Improving interoperation between different P2P systems Information storage, reliability, and retrieval in P2P systems. Better understand P2P system performance and user behavior “in the wild” 12IETF-73 -- Minneapolis

13. Practical Example Localization techniques for peer selection optimization (ALTO) Different approaches on how to compute and provide localization information are currently explored. ALTO charter being focused on the protocol, P2PRG proposes a forum where localization techniques can be discussed and documented Source: Vinay Aggarwal, Anja Feldmann, Christian Scheideler. Can ISPs and P2P systems co-operate for improved performance? ACM SIGCOMM Computer Communications Review, Volume 37, Number 3, July 2007. 13IETF-73 -- Minneapolis

14. 14 www.irtf.org IETF-73 -- Minneapolis