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Internet Engineering Task Force

Internet Engineering Task Force. RFC for IPv6 IP Identification (IPID) Field draft-elkins-6man-ipv6-diagnostic-header-00.txt. Tuesday July 26, 2011 Mike Ackermann: BCBS Michigan ( mackermann@bcbsm.com ) Nalini Elkins: Inside Products, Inc. (Nalini.elkins@insidethestack.com). TODAY’S AGENDA.

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Internet Engineering Task Force

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  1. Internet Engineering Task Force RFC for IPv6 IP Identification (IPID) Field draft-elkins-6man-ipv6-diagnostic-header-00.txt Tuesday July 26, 2011 Mike Ackermann: BCBS Michigan (mackermann@bcbsm.com) Nalini Elkins: Inside Products, Inc. (Nalini.elkins@insidethestack.com)

  2. TODAY’S AGENDA • IPID FIELD IN IPv4 • IPID FIELD IN IPv6 – CURRENT STATE • RECOMMENDATION FOR IPID FIELD IN IPv6

  3. IPID FIELD IN IPv4 • IPID: Internet Protocol Identification. Provides a unique identifying number for a given IP packet within a flow. • Sometimes called Datagram number. • Stated Usage • Enable Fragmentation. • De Facto Usage • Logically associate packets across complex network situations. • Of particular value in matching traces taken at multiple points 3

  4. IPID FIELD IN IPv6 – CURRENT STATE 4 • Implemented in Fragment Extension Header (Type 44). • Location: • 32 bit field at offset 4 in FEH. • Issues: • Only used if Fragmentation required. • Is a 32 bit field large enough? • IPID not always available to facilitate network diagnostics. ************

  5. RECOMMENDATION FOR IPID FIELD IN IPv6 5 • Implement in Destination Options Extension Header (Type 60). • New Option Type: • 32 or 64 bit field at offset 8 in DOH. (Options Field). • Details: • Header sent by implementations upon request. • If sent in Diagnostic Mode, header MUST be ignored by receiver (intended for packet trace systems only). • New DOH Option is proposed. • Future: Additional Options could be added for other diagnostic or security purposes as deemed appropriate.

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