Sampling and Filtering Techniques for IP Packet Selection - Update - draft-ietf-psamp-sample-tech-04.txt

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Sampling and Filtering Techniques for IP Packet
Selection- Update - draft-ietf-psamp-sample-tec
h-04.txt

• Tanja Zseby, FhG FOKUS
• Maurizio Molina, NEC Europe Ltd.
• Fredric Raspall, NEC Europe Ltd.
• Nick Duffield, ATT Labs

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Open Issue from last meeting

• Open Issue IPR on Hash Function
• 2 mandatory hash functions
• Potential IPR from ATT
• Now ATT IPR statement http//www.ietf.org/ietf/I
  PR/att-ipr-draft-ietf-psamp-framework.txt
• Solution Will include IPR statement in next
  version
• Open Issue Hash function support for IPv6 and
  MPLS
• IPSX does not support IPv6
• Solution other function ? additional function?
  Limit MUST to IPv4 ?

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New Open Issue Filter Definition

• Currently low-level filter definition
• Based on bitfield computation (masks, ranges)
• Generic but complicates filtering definition,
  reporting
• Problems with Info Model (see mail from Thomas
  Dietz)
• ? High level filter definition needed
• Proposal Call for proposals to express complex
  filters
• If no suitable proposal (within next 3 weeks) ?
  Use simple definition vendor extensions
• Filter based on IPFIX fields
• only AND operation
• no OR operation
• no ranges
• Everything else vendor specific
• Substitute current definition

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Minor Issues

• Some Restructuring
• Move sampling schemes (3.1) from scope (section
  3.) to new section on sampling (new section 4)
• PSAMP and IPFIX combine text from terminology
  and scope section into new section or just add
  reference ?
• Allow concatenated selector IDs
• To express combinations of selectors
• Add example for stratified sampling
• Double-check consistency with new FW draft
• Some minor changes (terms in upper case, typos,
  etc.)

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Thank you for your attention !

• Questions ?