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NTLP strawman draft-schulzrinne-gimps

An innovative approach allowing flexible NSLP choices, RSVP-like philosophy, and Transport principles for streamlined delivery. Focus on TLV structure, state maintenance, security, and design enhancements for NSIS. Work needed on state management, packet format, multihoming, NAT behavior, mobility, and security mechanisms.

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NTLP strawman draft-schulzrinne-gimps

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  1. NTLP strawmandraft-schulzrinne-gimps Henning Schulzrinne Columbia University IETF57 - NSIS

  2. Philosophy/approach • "Tool kit" approach: • allow different NSLPs to choose trade-offs as needed: • from unreliable one-shot to reliable large-message delivery • allow NEs to choose time vs. space trade-off • RSVP-like in philosophy: • follow data path (but logically separable) • soft state state time-out, with explicit state removal • Transport philosophy: • do easy parts within simple transport: • small messages (< 500 bytes)  no fragmentation • first messages in session (unknown next hop) • reliable hop-by-hop delivery • leave hard parts to real transport protocols: • invoked only when needed • offer fast recovery (< n*RTT), flow control, congestion control, fragmentation, … IETF57 - NSIS

  3. Other design choices • TLV structure like RSVP • Refresh reduction like 2961 (needs details) • No explicit support for multicast • but addable – strict hop-by-hop behavior should make this easy IETF57 - NSIS

  4. What needs work • Name  • State maintenance for transport state: • remove when last session state removed • remove after idle timer (trade space for time) • remove LRU when out of space • State estimate (~ sessions + next hops) • Describe NSLP-specific next-hop selection • Packet format • Multihoming • NAT behavior • Mobility behavior • primarily dead-branch removal • Security mechanisms • can negotiate TLS and IPsec • how much is really needed IETF57 - NSIS

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