Hi Michael, I think that for us the problem won't appear as we do not need to synchronize sequence numbers, just check that they are not duplicates ( the last seen and the new one are different and the new one is not 0 while the stored one is different than 0).
regards, Xavi 2017-09-08 19:40 GMT+02:00 Prof. Diego Dujovne <[email protected]>: > Michael, > Well, I could not attend today to the webex call > and I may have not been aware that a sequence number > was proposed to be used in SF0 / SFX. > Regards, > > Diego > > 2017-09-08 12:57 GMT-03:00 Michael Richardson <[email protected]>: > >> >> > We do not use sequence numbers in SF0. Why do you ask for lollipop >> > sequence scheme? >> >> Sorry, I mispoke. I'm poor ignorant guy who knows little about >> scheduling :-) >> It's about 6P not SF0... which is used in SFx. >> Xavi spoke about it in today's call. >> >> > I wondered why it was called a Lollipop Sequence Number, so I asked >> > Google, >> > and saw: >> > https://en.wikipedia.org/wiki/Lollipop_sequence_numbering >> >> > which says: >> > Lollipop sequence numbering was originally believed to resolve the >> > ambiguity problem in cyclic sequence numbering schemes, and was >> used in >> > OSPF version 1 for this reason. Later work showed that this was not >> the >> > case, like in the ARPANET sequence bug, and OSPF version 2 replaced >> it >> > with a linear numbering space, with special rules for what happens >> when >> > the sequence numbers reach the end of the numbering space[1]. >> >> > with a link to: >> > http://www.ciscopress.com/articles/article.asp?p=24090&seqNum=4 >> >> > are we sure that we are not being bitten in the same way? >> >> >> -- >> Michael Richardson <[email protected]>, Sandelman Software Works >> -= IPv6 IoT consulting =- >> >> >> >> >> _______________________________________________ >> 6tisch mailing list >> [email protected] >> https://www.ietf.org/mailman/listinfo/6tisch >> >> > > > -- > DIEGO DUJOVNE > Profesor Asociado > Escuela de Informática y Telecomunicaciones > Facultad de Ingeniería - Universidad Diego Portales - Chile > www.ingenieria.udp.cl > (56 2) 676 8125 > > _______________________________________________ > 6tisch mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/6tisch > > -- Dr. Xavier Vilajosana Wireless Networks Lab *Internet Interdisciplinary Institute (IN3)Professor* (+34) 646 633 681 [email protected] <[email protected]> http://xvilajosana.org http://wine.rdi.uoc.edu Parc Mediterrani de la Tecnologia Av Carl Friedrich Gauss 5, B3 Building 08860 Castelldefels (Barcelona). Catalonia. Spain [image: Universitat Oberta de Catalunya]
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