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MBus Transport Protocol Update: Specification Enhancements and Outstanding Issues

This document outlines updates made to the draft-ietf-mmusic-mbus-transport protocol, including new features such as broadcast support, security considerations, and IPv6 compatibility. It also addresses remaining issues related to security, IPv6 implementation, and congestion control. The document provides details on the recent changes, requirements overview, message semantics, and pending updates to ensure the stability and reliability of the MBus transport protocol.

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MBus Transport Protocol Update: Specification Enhancements and Outstanding Issues

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  1. Mbus Update draft-ietf-mmusic-mbus-transport-03.txt Jörg Ott jo@tzi.uni-bremen.de Colin Perkins csp@east.isi.edu Dirk Kutscher dku@tzi.uni-bremen.de 49. IETF, San Diego Ott/Perkins/Kutscher

  2. Quick Reminder • Local coordination mechanism • Specification split into three pieces • Requirements overview • Definition of the “transport protocol” • Message syntax, addressing, local multicast, reliability, authentication, ... • Definition of the message semantics • Call-control, media tools related commands 49. IETF, San Diego Ott/Perkins/Kutscher

  3. Overview of Changes indraft-ietf-mmusic-mbus-transport-03 • Allow for use of broadcast • Only when multicast is not available • Scope-relative multicast address • Yet to be assigned • MUST NOT use scopes larger than link-local • Resolution of timestamps now milliseconds • Bug-fixes • Message syntax ABNF, use CRLF throughout 49. IETF, San Diego Ott/Perkins/Kutscher

  4. Remaining Issues • Security • Currently advocating DES • Adopt AES, padding is already considered • IPv6 • Should already be considered, need to check once more • References in draft • Check normative references etc. • Congestion Control required? • Remember: link-local scope • Cannot determine link bandwidth reliably • There may not be receivers behind every bridge… • IANA • Scope-relative address and port number • Registration has been requested… 49. IETF, San Diego Ott/Perkins/Kutscher

  5. Next steps • Mbus-transport essentially stable • Pending small changes... • No further features/changes planned • One more draft submission before WG-last-call? • Standards Track or Informational? 49. IETF, San Diego Ott/Perkins/Kutscher

  6. http://www.dmn.tzi.org/ietf/mmusic/mbus/ 49. IETF, San Diego Ott/Perkins/Kutscher

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