Re: [ipfix] IPFIX protocol evaluation: candidate protocols
Juergen Quittek <quittek@ccrle.nec.de> Tue, 27 August 2002 17:43 UTC
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Date: Tue, 27 Aug 2002 19:21:29 +0200
From: Juergen Quittek <quittek@ccrle.nec.de>
To: Nevil Brownlee <n.brownlee@auckland.ac.nz>, ipfix@net.doit.wisc.edu
Subject: Re: [ipfix] IPFIX protocol evaluation: candidate protocols
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Hi Nevil, We (the authors of the requirements draft) just finished editing a new version of the requirements document. Sebastian did a great job in very carefully reviewing each sentence. His comments and comments by others lead to 28 minor editorial changes, 12 fixed typos, and the following non-trivial changes: 1. We moved the requirement for time synchronization (Section 5.5.) from SHOULD to MUST and explained how this MUST can be met with little effort. We replaced the original Section 5.5. Time Synchronization Metering processes and collecting processes SHOULD be time- synchronized with each other. Using NTP or GPS are possible ways of achieving this. However selecting a method for time synchronization is not in the scope of this document. by 5.5. Time Synchronization It MUST be possible to synchronize timestamps generated by a metering process with Coordinated Universal Time (UTC). Note that the possibility of synchronizing timestamps of each single metering process with UTC implies the possibility of synchronizing timestamps generated by different metering processes. Note that this does not necessarily imply that timestamps generated by the metering process are UTC timestamps. For example, this requirement can be met by using local system clock values as timestamps and adding an additional timestamp when exporting a report to a collecting process. Then the collecting process can synchronize the timestamps by calculating the offset between UTC and the system clock of the metering process. 2. We moved (as suggested by Paul) in Section 6.1. the MUST attributes "input interface" and "output interface" from MUST to SHOULD: "7. input interface (ifIndex)" -> "18. input interface (ifIndex)". "8. output interface (ifIndex)" -> "19. output interface (ifIndex)". 3. We removed in Section 6.1. the MUST attribute "13. if BGP is supported at the observation point: BGP AS number" and instead appended to the end of section 6.1.: "In addition, the exporting process MAY be able to report attributes related to inter-autonomous system routing of a flow, for example by reporting BGP Autonoumous System numbers." 4. We added another configuration requirement to Section 7.2. (as suggested by Sebastian on the mailing list): "3. the reporting interval This requirement only applies if the exporting process supports reporting in regular intervals." [For the advocates: Changes 2. and 3. imply renumbering of items in Section 6.1. Change 4. implies renumbering of items in Section 7.2.] Currently, we are all proof-reading the new version which we will hopefully finish soon. I will send a preview to the advocates, because they probably are already heavily working on getting their drafts finished by Monday. Cheers, Juergen --On 28 August 2002 04:23 +1200 Nevil Brownlee <n.brownlee@auckland.ac.nz> wrote: > > Hello all: > > So far we have advocates for five candidate protocols. They are > shown below as: > > Protocol Advocate Date announced > documents describing the protocol > .......................................................... > > CRANE Kevin Zhang 18 Jul > draft-kzhang-crane-protocol-04.txt > > DIAMETER Sebastian Zander 7 Aug > draft-ietf-aaa-diameter-12.txt > > LFAP v5.0 Paul Calato 30 Jul > draft-riverstone-lfap-01.txt, and > draft-riverstone-lfap-data-01.txt > > NetFlow v9 Benoit Claise 18 Jul > draft-bclaise-netflow-9-00.txt > > Streaming IPDR Jeff Meyer 9 Aug > http://www.ipdr.org/documents/ipfix > (submitted to internet-drafts, 20 Aug as > draft-meyer-ipdr-streaming-00.txt) > > Closing date for declaring advocates is 2 Sep 02, i.e. this > coming Monday. After that no more protocols will be considered > in the IPFIX evaluation. > > The IPFIX Requirements draft has only one issue for which we still > need consensus, i.e. the reporting of in and out interfaces. > I'd really like to get the requirements draft through last call; > since this topic turns out to be so intertwined with implementation > issues, we sidestep it for now, and simply leave the requirement vague. > In other words, I suggest we just say "SHOULD report output and input > interfaces," and leave it to the protocol advocates to say how their > respective protocols handle such reporting. > > Cheers, Nevil > > ----------------------------------------------------------------------- > Nevil Brownlee Director, Technology Development > Phone: +64 9 373 7599 x8941 ITSS, The University of Auckland > FAX: +64 9 373 7021 Private Bag 92019, Auckland, New Zealand > > ------------------------------------------------- > This mail sent through IMP: http://horde.org/imp/ > > -- > Help mailto:majordomo@net.doit.wisc.edu and say "help" in message body > Unsubscribe mailto:majordomo@net.doit.wisc.edu and say > "unsubscribe ipfix" in message body > Archive http://ipfix.doit.wisc.edu/archive/ -- Help mailto:majordomo@net.doit.wisc.edu and say "help" in message body Unsubscribe mailto:majordomo@net.doit.wisc.edu and say "unsubscribe ipfix" in message body Archive http://ipfix.doit.wisc.edu/archive/
- [ipfix] IPFIX protocol evaluation: candidate prot… Nevil Brownlee
- Re: [ipfix] IPFIX protocol evaluation: candidate … calato
- Re: [ipfix] IPFIX protocol evaluation: candidate … Juergen Quittek