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

Update on the Internet Research Task Force

Aaron FalkIRTF Chair

IETF-73 – Minneapolis

IETF-73 -- Minneapolis 2

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)

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


A brief diversion into something other than status…

2 minute intro to the

Delay-Tolerant Networking Research Group

DTNRG

Slides courtesy of:Kevin Fall, Intel ResearchStephen Farrell, Trinity College DublinLloyd Wood, Cisco

Multi-path

USBUSB

Delay Tolerant Networking

NET( DSL )

DTNAgent

NET

NETwireless

SENDER APP

RECEIVER APP

Network

Store-carry-forward of messages

Multi-party comms modelFeatures

Extensible (URI-based) naming Supports multi-path routing and

caching with e2e disruptions6

DTNAgent

NETCACHE

DTNAgent

IETF-73 -- Minneapolis

Internet Stack

7

RouterHost Host

Application

Transport

Network

Data Link

Physical

No significant buffering here

Hosts always run IP and up

Needs each type of physical linkLoss of link loss of path (and possibly loss of useful work)


DTN Stack

8

DTN RouterHost Non-IPHost

Application

Transport

Network

Data Link

Bundle

Physical

Intermittent LinkConventionalRouter

Custody Transfer Storage: helps to tolerate e2e disruption

Non-IP InternetIP Internet


Delay-Tolerant Networking RG: Bundle Protocol now tested in spaceCode 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


2 minute intro to the

Peer-to-Peer Research GroupP2PRG

Slides courtesy of:Volker Hilt, Bell LabsStefano Previdi, Cisco

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


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

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

www.irtf.org


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

Documents

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