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M2PA: Peer Adapta. for IP Networks

Understand MTP2 Peer-to-Peer Adaptation Layer (M2PA) in the IETF SIGTRAN Working Group. Learn about M2PA architecture, SCTP protocol, SS7 signaling, M2PA states, unresolved issues, and future plans. Explore implications for IP networks and relevant changes.

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M2PA: Peer Adapta. for IP Networks

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  1. MTP2 Peer-to-Peer Adaptation Layer (M2PA)IETF SIGTRAN Working GroupDecember 14, 2000

  2. MTP2 M2PA M2PA MTP2 SCTP SCTP MTP1 IP IP MTP1 M2PA (Peer-to-Peer) Architecture SS7 IP IPSP SEP SG SS7 Appl SS7 Appl MTP3 MTP3 MTP3 Peer-to-Peer Link Protocol IP Network SEP - SS7 Signaling Endpoint M2PA - MTP2 Peer-to-peer Adaptation Layer SG - Signaling Gateway SCTP - Stream Control Transmission Protocol

  3. M2PA Changes • Changes in M2PA version 01 • draft-ietf-sigtran-m2pa-01- November 22, 2000 • IETF SIGTRAN WG item • Supercedes draft-george-sigtran-m2peer-02 • Added to 1.8.1: list of MTP3/M2PA primitives • Added 1.9: Differences between M2PA and M2UA • Added section 3: M2PA States

  4. M2PA Issues • Open issues • LI octet and Japanese SS7 - New message type? • State transitions (section 3) - Add details • Associations and links - Add another example to 4.1.2 • Processor Outage - Procedure like MTP2, or fail link like ATM? • Common header • Proving period - What to check for? • Can Link Initialization be made symmetric?

  5. M2PA Future • M2PA Future Plans • Resolve issues and add detail • M2PA Applicability Statement • M2PA MIB • Unique Port and SCTP Protocol Ids • Last Call around March 2001 (IETF Minneapolis)

  6. Backup Slides

  7. LI Octet Options • Options for LI Octet • Spare bits used in Japanese SS7 for MTP3 priority • 1. Begin User Data at LI • 1a. Always 8-bit LI field • 2. LI in User Data in Japan, not elsewhere • 3. Optional parameter with Priority in Data Message • 4. SG sets priority based on type of message • 5a. Put Priority into SIO spare bits • 5b. Precede SIO with octet including Priority • 6. TLV parameter for MTP3/MTP2 information • 7. Priority in Common Header • 8. New message type

  8. M2PA Changes • Changes in M2PA version 00 • draft-ietf-sigtran-m2pa-00- November 9, 2000 • New title • Clarified level 2 and 3 congestion procedures • Removed references to adding/removing headers • SLCs mapped but not processed • Processor Outage: Do not transmit messages • SCTP notifications have priority over User Data and Link Status

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