2020-03-19 2026-04-02 Specification Required Greg Mirsky, Michael Scharf Summary category shown. Complete registry entries available in the URIs of each row. 0 Reserved IETF 1 RTDelay_Active_IP-UDP-Periodic_RFC8912sec4_Seconds_95Percentile RTDelay_Active_IP-UDP-Periodic_RFC8912sec4_Seconds_95Percentile This metric assesses the delay of a stream of packets exchanged between two hosts (which are the two measurement points). The output is the round-trip delay for all successfully exchanged packets expressed as the 95th percentile of their conditional delay distribution. IETF 1.0 2 RTLoss_Active_IP-UDP-Periodic_RFC8912sec4_Percent_LossRatio RTLoss_Active_IP-UDP-Periodic_RFC8912sec4_Percent_LossRatio This metric assesses the loss ratio of a stream of packets exchanged between two hosts (which are the two measurement points). The output is the round-trip loss ratio for all successfully exchanged packets expressed as a percentage. IETF 1.0 3 OWPDV_Active_IP-UDP-Periodic_RFC8912sec5_Seconds_95Percentile OWPDV_Active_IP-UDP-Periodic_RFC8912sec5_Seconds_95Percentile This metric assesses packet delay variation with respect to the minimum delay observed on the periodic stream. The output is expressed as the 95th percentile of the packet delay variation distribution. IETF 1.0 4 RTDNS_Active_IP-UDP-Poisson_RFC8912sec6_Seconds_Raw RTDNS_Active_IP-UDP-Poisson_RFC8912sec6_Seconds_Raw This is a metric for DNS Response performance from a network user's perspective, for a specific named resource. The metric can be measured repeatedly using different resource names. This metric assesses the response time, the interval from the query transmission to the response. IETF 1.0 5 RLDNS_Active_IP-UDP-Poisson_RFC8912sec6_Logical_Raw RLDNS_Active_IP-UDP-Poisson_RFC8912sec6_Logical_Raw This is a metric for DNS Response performance from a network user's perspective, for a specific named resource. The metric can be measured repeatedly using different resource names. This metric indicates that the response was deemed lost. In other words, the response time exceeded the maximum waiting time. IETF 1.0 6 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_95Percentile OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_95Percentile This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the 95Percentile of one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 7 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Mean OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Mean This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the Mean of one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 8 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Min OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Min This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the Min of one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 9 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Max OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_Max This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the Max of one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 10 OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_StdDev OWDelay_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Seconds_StdDev This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the StdDev of one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 11 OWLoss_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Percent_LossRatio OWLoss_Active_IP-UDP-Poisson-Payload250B_RFC8912sec7_Percent_LossRatio This metric assesses the loss ratio of a stream of packets exchanged between two hosts (which are the two measurement points). The output is the one-way loss ratio for all transmitted packets expressed as a percentage. IETF 1.0 12 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_95Percentile OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_95Percentile This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the 95Percentile one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 13 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Mean OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Mean This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the Mean one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 14 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Min OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Min This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the Min one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 15 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Max OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_Max This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the Max one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 16 OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_StdDev OWDelay_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Seconds_StdDev This metric assesses the delay of a stream of packets exchanged between two hosts (or measurement points) and reports the StdDev one-way delay for all successfully exchanged packets based on their conditional delay distribution. IETF 1.0 17 OWLoss_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Percent_LossRatio OWLoss_Active_IP-UDP-Periodic20m-Payload142B_RFC8912sec8_Percent_LossRatio This metric assesses the loss ratio of a stream of packets exchanged between two hosts (which are the two measurement points). The output is the one-way loss ratio for all transmitted packets expressed as a percentage. IETF 1.0 18 RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Mean RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Mean This metric assesses the delay of a stream of ICMP packets exchanged between two hosts (which are the two measurement points). The output is the round-trip delay for all successfully exchanged packets expressed as the Mean of their conditional delay distribution. IETF 1.0 19 RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Min RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Min This metric assesses the delay of a stream of ICMP packets exchanged between two hosts (which are the two measurement points). The output is the round-trip delay for all successfully exchanged packets expressed as the Min of their conditional delay distribution. IETF 1.0 20 RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Max RTDelay_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Seconds_Max This metric assesses the delay of a stream of ICMP packets exchanged between two hosts (which are the two measurement points). The output is the round-trip delay for all successfully exchanged packets expressed as the Max of their conditional delay distribution. IETF 1.0 21 RTLoss_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Percent_LossRatio RTLoss_Active_IP-ICMP-SendOnRcv_RFC8912sec9_Percent_LossRatio This metric assesses the loss ratio of a stream of ICMP packets exchanged between two hosts (which are the two measurement points). The output is the round-trip loss ratio for all transmitted packets expressed as a percentage. IETF 1.0 22 RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Mean RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Mean This metric assesses the round-trip delay of TCP packets constituting a single connection, exchanged between two hosts. We consider the measurement of round-trip delay based on a single Observation Point (OP) [RFC7011] somewhere in the network. The output is the round-trip delay for all successfully exchanged packets expressed as the Mean of their conditional delay distribution. IETF 1.0 23 RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Min RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Min This metric assesses the round-trip delay of TCP packets constituting a single connection, exchanged between two hosts. We consider the measurement of round-trip delay based on a single Observation Point (OP) [RFC7011] somewhere in the network. The output is the round-trip delay for all successfully exchanged packets expressed as the Min of their conditional delay distribution. IETF 1.0 24 RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Max RTDelay_Passive_IP-TCP_RFC8912sec10_Seconds_Max This metric assesses the round-trip delay of TCP packets constituting a single connection, exchanged between two hosts. We consider the measurement of round-trip delay based on a single Observation Point (OP) [RFC7011] somewhere in the network. The output is the round-trip delay for all successfully exchanged packets expressed as the Max of their conditional delay distribution. IETF 1.0 25 RTDelay_Passive_IP-TCP-HS_RFC8912sec10_Seconds_Singleton RTDelay_Passive_IP-TCP-HS_RFC8912sec10_Seconds_Singleton RTDelay Singleton: This metric assesses the round-trip delay of TCP packets initiating a single connection (or 3-way handshake), exchanged between two hosts. We consider the measurement of round-trip delay based on a single Observation Point (OP) [RFC7011] somewhere in the network. The output is a single measurement of Round-trip delay, or Singleton. IETF 1.0 26 RTLoss_Passive_IP-TCP_RFC8912sec10_Packet_Count RTLoss_Passive_IP-TCP_RFC8912sec10_Packet_Count This metric assesses the estimated loss count for TCP packets constituting a single connection, exchanged between two hosts. We consider the measurement of round-trip delay based on a single Observation Point (OP) [RFC7011] somewhere in the network. The output is the estimated loss count for the measurement interval. IETF 1.0 27 OWDelay_HybridType1_IP_RFC9951_Seconds_Mean OWDelay_HybridType1_IP_RFC9951_Seconds_Mean This metric assesses the mean of one-way delays of all successfully forwarded IP packets constituting a single Flow. The measurement of one-sway delay is based on a single Observation Point somewhere in the network. IETF 1.0 28 OWDelay_HybridType1_IP_RFC9951_Seconds_Min OWDelay_HybridType1_IP_RFC9951_Seconds_Min This metric assesses the minimum of one-way delays of all successfully forwarded IP packets constituting a single Flow. The measurement of one-way delay is based on a single Observation Point somewhere in the network. IETF 1.0 29 OWDelay_HybridType1_IP_RFC9951_Seconds_Max OWDelay_HybridType1_IP_RFC9951_Seconds_Max This metric assesses the maximum of one-way delays of all successfully forwarded IP packets constituting a single Flow. The measurement of one-way delay is based on a single Observation Point somewhere in the network. IETF 1.0 30 OWDelay_HybridType1_IP_RFC9951_Seconds_Sum OWDelay_HybridType1_IP_RFC9951_Seconds_Sum This metric assesses the maximum of one-way delays of all successfully forwarded IP packets constituting a single Flow. The measurement of one-way delay is based on a single Observation Point somewhere in the network. IETF 1.0 Specification Required Greg Mirsky, Michael Scharf MetricType RTDelay Round-Trip Delay IETF MetricType RTDNS Response Time Domain Name Service IETF MetricType RLDNS Response Loss Domain Name Service IETF MetricType OWDelay One-Way Delay IETF MetricType RTLoss Round-Trip Loss IETF MetricType OWLoss One-Way Loss IETF MetricType OWPDV One-Way Packet Delay Variation IETF MetricType OWIPDV One-Way Inter-Packet Delay Variation IETF MetricType OWReorder One-Way Packet Reordering IETF MetricType OWDuplic One-Way Packet Duplication IETF MetricType OWBTC One-Way Bulk Transport Capacity IETF MetricType OWMBM One-Way Model-Based Metric IETF MetricType SPMonitor Single-Point Monitor IETF MetricType MPMonitor Multi-Point Monitor IETF Specification Required Greg Mirsky, Michael Scharf Method Active depends on a dedicated measurement packet stream and observations of the stream as described in [RFC7799] IETF Method Passive depends *solely* on observation of one or more existing packet streams as described in [RFC7799] IETF Method Hybrid Type 1 Hybrid Type I obervations on one stream that combine both Active Methods and Passive Methods as described in [RFC7799] IETF Method Hybrid Type 2 Hybrid Type II obervations on two or more streams that combine both Active Methods and Passive Methods as described in [RFC7799] IETF Method Spatial spatial metric as described in [RFC5644] IETF Specification Required Greg Mirsky, Michael Scharf SubTypeMethod ICMP Internet Control Message Protocol IETF SubTypeMethod IP Internet Protocol IETF SubTypeMethod DSCPxx where xx is replaced by a Diffserv code point IETF SubTypeMethod UDP User Datagram Protocol IETF SubTypeMethod TCP Transport Control Protocol IETF SubTypeMethod QUIC QUIC transport protocol IETF SubTypeMethod HS Hand-Shake, such as TCP's 3-way HS IETF SubTypeMethod Poisson packet generation using Poisson distribution IETF SubTypeMethod Periodic periodic packet generation IETF SubTypeMethod SendOnRcv Sender keeps one packet in transit by sending when previous packet arrives IETF SubTypeMethod PayloadxxxxB where xxxx is replaced by an integer, the number of octets or 8-bit Bytes in the Payload IETF SubTypeMethod SustaninedBurst capacity test, worst case IETF SubTypeMethod StandingQueue test of bottleneck queue behavior IETF Specification Required Greg Mirsky, Michael Scharf Spec contains an immutable document identifier combined with a document section identifier for the specifying document. See Section 7.1.2 of [RFC8911]. Spec Specification Required Greg Mirsky, Michael Scharf Units Seconds IETF Units Ratio unitless IETF Units Percent value multiplied by 100% IETF Units Logical 1 or 0 IETF Units Packets IETF Units BPS bits per second IETF Units PPS packets per second IETF Units EventTotal for unitless counts IETF Units Multiple more than one type of unit IETF Units Enumerated a list of outcomes IETF Units Unitless IETF Specification Required Greg Mirsky, Michael Scharf Output Singleton IETF Output Raw multiple singletons IETF Output Count IETF Output Minimum IETF Output Maximum IETF Output Median IETF Output Mean IETF Output 95Percentile 95th Percentile IETF Output 99Percentile 99th Percentile IETF Output StdDev standard deviation IETF Output Variance IETF Output PFI pass, fail, inconclusive IETF Output FlowRecords descriptions of flows observed IETF Output LossRatio lost packets to total packets, <=1 IETF