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San Diego, December 2000

Status of:. CRTP OVER AAL2 Tunneling Multiplexed Compressed RTP ("TCRTP") CRTP Enhancements CRTP Over PPP. San Diego, December 2000. Generalized to PPP over AAL2 Presented in pppext WG. CRTP OVER AAL2 draft-buffam-avt-crtp-over-aal2-01.txt. draft-ietf-avt-tcrtp-02.txt

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San Diego, December 2000

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  1. Status of: CRTP OVER AAL2 Tunneling Multiplexed Compressed RTP ("TCRTP") CRTP Enhancements CRTP Over PPP San Diego, December 2000

  2. Generalized to PPP over AAL2 Presented in pppext WG CRTP OVER AAL2draft-buffam-avt-crtp-over-aal2-01.txt

  3. draft-ietf-avt-tcrtp-02.txt B. Thompson, T. Koren, D. Wing Cisco Systems San Diego, December 2000 Tunneling Multiplexed Compressed RTP ("TCRTP")

  4. Changes in draft-ietf-avt-tcrtp-02.txt New Section 6 Added to Draft Describes minimum control plane negotiation required for TCRTP L2TP Tunnel establishment – 8 messages LCP Negotiation, IPCP Negotiation – 8 messages Proposing TCRTP goes to last call Status

  5. Merged enhancements into RFC2508 CRTP Enhancementsdraft-ietf-avt-crtp-enhance-01.txt

  6. Including IP ID in the UDP checksum CRTP headers checksum ACK packet Acknowledge reception of a packet FH of a new compressed stream Update packet (ACK mode) Reject a new compressed stream Negative cache stream flag Enhancement to COMPRESED_UDP packet format (CU*) Select mode of operation N mode ACK mode The Enhancements

  7. CONTEXT_STATE packet: +---+---+---+---+---+---+---+---+---+---+ | Type code=6: Select operation mode | +---+---+---+---+---+---+---+---+---+---+ | Opcode | +---+---+---+---+---+---+---+---+---+---+ : Parameter: N : +.......................................+ Opcode Mnemonic Description ------------------------------------------------------- 1 REQMODE-N Request to move to N mode 2 ACKMODE-N Acknowledge move to N mode 3 REQMODE-A Request to move to ACK mode 4 ACKMODE-A Acknowledge move to ACK mode Select Operation Mode

  8. Compressor selects operation mode REQMODE-N request to operate in N mode REQMODE-A request to operate in ACK mode Parameter: current N Decompressor acknowledges operation mode ACKMODE-N accept operation in N mode ACKMODE-A accept operation in ACK mode Parameter: suggested N Can be based on the maximum number of adjacent lost/misordered packets observed by the decompressor since last report Select Operation Mode

  9. RFC2509: Added suboptions to the IPCP configuration option “IP Compression Protocol” for CRTP protocol (0x61) Suboption 2 (length 2): use all CRTP enhancements Suboption 3 (length 2): use all CRTP enhancements except for the ACK scheme CRTP Over PPPdraft-koren-avt-crtp-ipcp-00.txt

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