V následující tabulce jsou uvedeny definice informačních prvků IPFIX.
| 384 | valueDistributionMethod | Popis metody používané pro distribuci záznamů čítačů z přispívajících toků do agregovaných toků popsaných v přidruženém rozsahu, obecně v šabloně. Tato metoda je určena pro použití pro všechny prvky neklíčových informací v odkazovaném rozsahu, pro které je distribuce hodnot platnou operací. Pokud se v šabloně objeví prvky informací originalFlowsInitiated a/nebo originalFlowsCompleted, nejsou předmětem této distribuční metody, protože každý z nich odvozuje svou vlastní distribuční metodu. Jde o kompletní sadu možných způsobů distribuce hodnot kódovanou následujícím způsobem: +-------+-----------------------------------------------------------+ | Value | Description | +-------+-----------------------------------------------------------+ | 0 | Unspecified: The counters for an Original Flow are | | | explicitly not distributed according to any other method | | | defined for this Information Element; use for arbitrary | | | distribution, or distribution algorithms not described by | | | any other codepoint. | | | --------------------------------------------------------- | | | | | 1 | Start Interval: The counters for an Original Flow are | | | added to the counters of the appropriate Aggregated Flow | | | containing the start time of the Original Flow. This | | | must be assumed the default if value distribution | | | information is not available at a Collecting Process for | | | an Aggregated Flow. | | | --------------------------------------------------------- | | | | | 2 | End Interval: The counters for an Original Flow are added | | | to the counters of the appropriate Aggregated Flow | | | containing the end time of the Original Flow. | | | --------------------------------------------------------- | | | | | 3 | Mid Interval: The counters for an Original Flow are added | | | to the counters of a single appropriate Aggregated Flow | | | containing some timestamp between start and end time of | | | the Original Flow. | | | --------------------------------------------------------- | | | | | 4 | Simple Uniform Distribution: Each counter for an Original | | | Flow is divided by the number of time intervals the | | | Original Flow covers (that is, of appropriate Aggregated | | | Flows sharing the same Flow Key), and this number is | | | added to each corresponding counter in each Aggregated | | | Flow. | | | --------------------------------------------------------- | | | | | 5 | Proportional Uniform Distribution: Each counter for an | | | Original Flow is divided by the number of time units the | | | Original Flow covers, to derive a mean count rate. This | | | mean count rate is then multiplied by the number of times | | | units in the intersection of the duration of the Original | | | Flow and the time interval of each Aggregated Flow. This | | | is like simple uniform distribution, but accounts for the | | | fractional portions of a time interval covered by an | | | Original Flow in the first- and last-time interval. | | | --------------------------------------------------------- | | | | | 6 | Simulated Process: Each counter of the Original Flow is | | | distributed among the intervals of the Aggregated Flows | | | according to some function the Intermediate Aggregation | | | Process uses based upon properties of Flows presumed to | | | be like the Original Flow. This is essentially an | | | assertion that the Intermediate Aggregation Process has | | | no direct packet timing information but is nevertheless | | | not using one of the other simpler distribution methods. | | | The Intermediate Aggregation Process specifically makes | | | no assertion as to the correctness of the simulation. | | | --------------------------------------------------------- | | | | | 7 | Direct: The Intermediate Aggregation Process has access | | | to the original packet timings from the packets making up | | | the Original Flow, and uses these to distribute or | | | recalculate the counters. | +-------+-----------------------------------------------------------+ |
| 239 | biflowDirection | Popis metody přiřazení směru použité k přiřazení zdroje a cíle Biflow. Tento informační prvek může být přítomen v záznamu toku dat nebo je aplikován na všechny toky exportované z procesu exportu nebo domény sledování za použití možností IPFIX. Pokud tento informační prvek není přítomen v záznamu toku nebo není spojen s Biflow prostřednictvím rozsahu, předpokládá se, že konfigurace metody přiřazování směru se provádí mimo pásmo.
Poznámka: Při použití možností IPFIX k použití tohoto informačního prvku pro všechny toky v rámci domény sledování nebo z procesu exportu musí být možnost odeslána spolehlivě. Pokud není k dispozici spolehlivý přenos (tj. při použití UDP), musí se tento informační prvek objevit v každém záznamu toku.
Toto pole může nabývat následujících hodnot: +-------+------------------+----------------------------------------+ | Value | Name | Description | +-------+------------------+----------------------------------------+ | 0x00 | arbitrary | Direction is assigned arbitrarily. | | 0x01 | initiator | The Biflow Source is the flow | | | | initiator, as determined by the | | | | Metering Process' best effort to | | | | detect the initiator. | | 0x02 | reverseInitiator | The Biflow Destination is the flow | | | | initiator, as determined by the | | | | Metering Process' best effort to | | | | detect the initiator. This value is | | | | provided for the convenience of | | | | Exporting Processes to revise an | | | | initiator estimate without re-encoding | | | | the Biflow Record. | | 0x03 | perimeter | The Biflow Source is the endpoint | | | | outside of a defined perimeter. The | | | | perimeter's definition is implicit in | | | | the set of Biflow Source and Biflow | | | | Destination addresses exported in the | | | | Biflow Records. | +-------+------------------+----------------------------------------+ |
