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RFC 4148 and the IPPM Metrics Registry are Obsolete

RFC 4148 and the IPPM Metrics Registry are Obsolete. Al Morton November 2010 draft-morton-ippm-rfc4148-obsolete-02. Recommendations. the IETF reclassify [RFC4148] (Stephan, E., “IP Performance Metrics (IPPM) Metrics Registry,” August 2005.) as Historic

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RFC 4148 and the IPPM Metrics Registry are Obsolete

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  1. RFC 4148 and the IPPM Metrics Registry are Obsolete Al Morton November 2010 draft-morton-ippm-rfc4148-obsolete-02

  2. Recommendations • the IETF reclassify [RFC4148] (Stephan, E., “IP Performance Metrics (IPPM) Metrics Registry,” August 2005.) as Historic • the IANA withdraw the current IPPM Metrics Registry • Simply means no new registrations! • IF someone had spoken-up, could STILL use registry! • IPPM’s metrics don’t lend themselves to simple Registration; the flexibility was intentional.

  3. Backup

  4. Issues with the current Registry • IETF IPPM Metrics have MANY parameters (options) embedded in their definitions. • RFC 4148 scheme assigns a single registry entry per metric • ignores Type-P, Stream type, other parameters • registration without parameters does not permit useful comparisons • Current registry does not appear to be used • Otherwise, would have raised issues • Syntax example – error in RFC 5644

  5. Example Parameters • Src, the IP address of a host • Dst, the IP address of a host • T, a time (start of test interval) • Tf, a time (end of test interval) • lambda, a rate in reciprocal seconds (for Poisson Streams) • incT, the nominal duration of inter-packet interval, first bit to first bit (for Periodic Streams) • T0, a time that MUST be selected at random from the interval [T, T+dT] to start generating packets and taking measurements (for Periodic Streams) • TstampSrc, the wire time of the packet as measured at MP(Src) as it leaves for Dst. • TstampDst, the wire time of the packet as measured at MP(Dst), assigned to packets that arrive within a "reasonable" time. • Tmax, a maximum waiting time for packets to arrive, set sufficiently long to disambiguate packets with long delays from packets that are discarded (lost). • M, the total number of packets sent between T0 and Tf • N, the total number of packets received at Dst (sent between T0 and Tf) • Type-P, as defined in [RFC2330] (Paxson, V., Almes, G., Mahdavi, J., and M. Mathis, “Framework for IP Performance Metrics,” May 1998.), which includes any field that may affect a packet's treatment as it traverses the network

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