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GIST over SCTP draftfunsisntlpsctp00'txt

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It should be possible to extend GIST to support SCTP as transport. GIST over SCTP: ... Add 'SCTP' as a new transport protocol ID. Define Stack-Configuration ... – PowerPoint PPT presentation

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Title: GIST over SCTP draftfunsisntlpsctp00'txt


1
GIST over SCTPltdraft-fu-nsis-ntlp-sctp-00.txtgt
  • Xiaoming Fu
  • Christian Dickmann
  • Jon Crowcroft

2
Overview
  • Motivation
  • GIST over SCTP
  • Implementation status
  • Open issues
  • Next steps

3
Motivation
  • Current NTLP/GIST spec defines a flexible
    transport framework which (theoretically) allows
    any type of transport mechanism
  • Currently only support UDP, TCP and recently TLS
    over TCP
  • SCTP initially defined as a signaling transport
    protocol possesses many properties required by
    signaling transport
  • It should be possible to extend GIST to support
    SCTP as transport
  • GIST over SCTP
  • Describes the considerations of extending GIST to
    support
  • Basic SCTP features stream-based, multi-homing,
    etc
  • Considerations for partial reliability, TLS over
    SCTP

4
GIST Protocol Negotiation Overview (per GIST
draft)
Querying Node
Responding Node
  • Stack-Proposal sequence of Profiles
  • Profile stack of Protocol-Layers
  • Protocol-Layer protocol name and security /
    stack-configuration-data
  • Add new setup mechanisms by defining new
    protocol-layers

GIST-Query Stack-Proposal-Q(fixed for
interface and NSLPID)Node-Addressing-Information
(parameters for possible protocols)
GIST-Response Stack-Proposal-R(fixed for
interface and NSLPID)Node-Addressing-Information
(updated object from query)
GIST-Confirm (in C-mode) Stack-Proposal-R
(echoed)
5
GIST over SCTP
  • GIST stack proposal and its negotiation
  • Add SCTP as a new transport protocol ID
  • Define Stack-Configuration-Data for SCTP
  • Suggest rules to support multi-homing, PR-SCTP,
    TLS/SCTP
  • This proposal mainly discusses the necessary
    changes to GIST in order to use SCPT as
    transport.
  • Potentially, access router discovery can be also
    based on GIST

6
Implementation status
  • All basic SCTP support implemented in GIST
    release 0.2.0
  • TCP, with an exception when session number
    becomes very huge (40k)
  • SCTP expert told me this can be due to the Linux
    SCTP implementation
  • PR-SCTP and TLS/SCTP support TBD

7
Open Issues
  • How to exactly support multi-homing
  • Host multihoming is easy
  • Per neighbor-pair multihoming needs further study

8
Next Steps
  • Is this work useful?
  • Should it be accepted as a WG item?
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