1. 1 PSAMP Protocol Specifications PSAMP IETF-59 March 2, 2004 Benoit Claise Juergen Quittek

2. 222 IPFIX Protocol Latest News SCTP MUST be implemented by all compliant implementations. UDP and TCP is a MAY. SCTP SHOULD be used in deployments where exporters and collectors are communicating over links which are susceptible to congestion. TCP MAY be used in deployments where exporters and collectors communicate over links which are susceptible to congestion, but SCTP is preferred, due to its ability to limit back pressure on exporters (especially when using PR-SCTP) and its message vs. stream orientation. Other non-congestion aware protocols (like UDP) MAY be used in deployments where exporters and collectors always communicate over dedicated links which are not susceptible to congestion. Proposal for PSAMP: simply use the IPFIX transport protocol(s) Proposal for PSAMP: collector-based rate configuration not mentioned

3. 333 IPFIX Protocol Latest News New IETF and vendor Specific (option) templates Proposal for Time Synchronization Microsecond is a MUST for IPFIX (SHOULD for PSAMP) But also second, millisecond and nanosecond proposals Encoding of Information Model data types No new data types are needed for PSAMP Start of an IANA section Proposal: the PSAMP IANA section will refer to it New security section PSAMP and IPFIX have the same security requirements Proposal: the PSAMP security section will refer to it Start of an Metering Statistics section Listing of the open issues

4. 444 Sampling Case Example PSAMP Base Level of Functionality Packet Report: Packet Interpretation: Template FlowSet: Template Record (SEQUENCE_NUMBER, PACKET_SAMPLE, SELECTOR_ID) Options Template FlowSet: Options Template Record (SELECTOR_ID, SAMPLING_ALGO, SAMPLING PARAM, OBSERVATION POINT) Data FlowSet: Flow Data Record (SEQUENCE_NUMBER #, PACKET_SAMPLE xxx, SELECTOR_ID 1) Data FlowSet: Options Data Record (SELECTOR_ID 1, systematic sampling, 1/100, ifIndex 3)

5. 555 What’s new in version 01? Not much: we’ve all been busy with the IPFIX protocol draft!! Rewritten section 2 "Introduction“ Rewritten section 4 "Differences between PSAMP and IPFIX“ Editorial changes List of open issues

6. 666 To Be Done Cut and Paste the terminology section from [IPFIX- PROTO] Sampling and Filtering examples: Must clearly define the sampling examples Must have a filtering example Double check the examples with the information model elements. Example: Selector ID, packet- sample, sampling-algorithm, hash-value, etc… Describe the packet fragment encoding with the variable length data type IANA considerations and time synchronization references to IPFIX

7. 777 To Be Done A new section about the terminology comparison between [PSAMP-PROTO] (hence [IPFIX-PROTO]) and [PSAMP-FRAMEWORK] - Flow Data Records sent in Data FlowSet = packet report in [PSAMP-FRAMEWORK] - Options Data Record sent in Data FlowSet = packet interpretation in [PSAMP-FRAMEWORK] - Exporting Process in IPFIX = Reporting Process in [PSAMP- FRAMEWORK] Extend security considerations by a discussion on exported Payload Any others?

8. 888 Open Issue Do we want to distinguish an IPFIX Flow Record export with one packet from a PSAMP export? Sequential order of sampling/filtering. How to report the order to the collector? Any others?

9. 999 Open Issue Any feedback? Thank you Feel free to contribute!