rome ns

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Performance monitoring Performance monitoring meeting, Rome (Italy), 05-02-2003 Nicolas Simar, Network Engineer DANTE

Metric definition: 

Metric definition OWD - 1ms OWPL - Order? IPDV - 1ms Re-ordering Two definitions at IETF Interresting to histogram per “level of re-ordering” Singleton - Accuracy - cfr website

Metric definition: 

Metric definition RTT - 1ms for backward compatibility with existing systems Measurement should be done between two points for ... (when service available) IPv4 and IPv6 BE, Premium and LBE a fixed packet size for continuous measurement (which one?) a packet size specified for requested measurement Singleton - Accuracy - cfr website

What do we want to present to who?: 

What do we want to present to who? End user (over which period of time: 1min - 5min?) current metric value (time scale?) metric history (as well as traceroute history) Planning same as end-user should be able to access raw data NOC same as planning should be able to see the packets incoming in real time should be able to monitor a particular session should be able to set up a new session

Statistics: 

Statistics Do we want to exchange statistics or raw data between domains? Which statistics do we want to provide (which ones are the most useful?) Average, SDR (does it work on any sampling methods) Average max, average, average min Absolute max, min Over which period? For one given packet size in continuous mode

Statistics: 

Statistics Statistic showed and exchanged between domains on which time scale (1min - 5 min)? Statistics additivity/concatenation across several domains? Statistics accuracy across several domains?

Sampling: 

Sampling How do we want to sample? Relationship between singleton and sampling to achieve which statistics? How to get a “burst” similar to what Steve was mentionning? (via Poisson? Pre-defined pattern?) via Poisson? Pre-defined pattern? What is the RIPE behavior? How often? Who can study it, is doing it? How works Poisson?

Logical Model: 

Logical Model Domain central tool

Logical Model: 

Logical Model

Inter domain communication: 

Inter domain communication Need to have a standardise way of exchanging data between domain see what IPPM is doing see what e2epi is doing anything else? Requests and message format should be understood by every domain. Data exchange

Inter domain communication: 

Inter domain communication Need to have a standardise way of measuring the metrics, measurement point compatibility see what IPPM is doing anything else? Need to have a defined packet structure. Inter domain measurement

Domain central tool: 

Domain central tool Functions descriptions - 1st draft Communication module with other domains and domain web-interface check message format validity, authentication, request info to “request analysor” and send the result

Domain central tool: 

Domain central tool Functions descriptions - 1st draft Request “analysor” module receive a information request from communication module check if this data is available in the domain if yes, ask to the “path finder” module from which Point of measurement (PM) the data should come from. ask to the “data recuperator” to retrieve data (either in a centralised DB, in a distributed DB or on the PM itself) send information requested to communication module.

Domain central tool: 

Domain central tool Functions descriptions - 1st draft Path finder module receive a information request from communication module check according to the information received from the request “analysor” module which PMs and which domain ingress-egress are involved on the path and send back this information module should be linked to a network representation either via a database or to some routing information some parts of this module are model specific Quite challenging part :-)

Domain central tool: 

Domain central tool Functions descriptions - 1st draft Data “recuperator” module consists of several module to retrieve the data, up to one per type of information having to be retrieved (these modules are domain specific)

IPv6 requirements: 

IPv6 requirements Talking for xxx -> Gabriella

Date storage in a domain: 

Date storage in a domain Raw data distributed in PM Central database (to avoid too frequent access to MPs) Statistics (statistics over which period of time, which statistics) raw data (database size)

Measurement box wish list: 

Measurement box wish list Wish list by mid March any contribution/advices/help welcome metric, parameters, sampling, security, data storage, data accessibility, future evolution, accessibility, price, additional measurements, real time access of packet, 2 NIC (one for measurement, one to access data), scalability, else?

Concept test: 

Concept test Need of at least three consecutive domains having partially implemented PMs concept validation software being build on top of it (DANTE has resources)

Miscelaneous: 

Miscelaneous Henk answers DANTE to investigate cost of GPS installation or to receive PPS signal in PoPs (by mid March) Interest by a phone/video-conference every two week to discuss status of work new mailing list with history feature (thanks to SWITCH :-) Contact e2epi to see if both systems can be bridged

Miscelaneous: 

Miscelaneous Investigate more in depth with GRID to see if work can be shared Investigate which NRENs are interested (more than an intellectual interest ;-) by the concept to get their input Investigation of graphical representation

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