Hello Guangpeng If we take the DC sensors as use case and racks are organized in trees, and you add a new rack then there will be renumbering.
This is why it’s safer to use this tech at L2. For the better and the worse IoT standards happen to use the IP address as a node ID. I was there when ISA 100 made that decision and I understand why. I see the same arguments applying in list constrained environments. Now say that NSA is an L2 address or an L2.5 address. You get redundancy by allowing a node to have more than one L2 address. Renumbering is OK by reassigning Mac/IP matches - though it has to be done carefully/transactional my as MACs are reassigned. Do it at L3 and you’re screwed. Regards, Pascal > Le 22 août 2022 à 04:37, Liguangpeng (Roc, Network Technology Laboratory) > <liguangpeng=40huawei....@dmarc.ietf.org> a écrit : > > Hi Michael, > > Thanks for the clarification. Please see below: >> If I insert a new device in the tree, then all of the tree below that device >> has to >> renumber. > Technically saying, it may exist but it seems weird to insert a new device in > the middle of the tree. When a user wants a new device, a normal way is > append them to the network at the end of an existing rank. Totally, you > mentioned a topology change manually, for which we put a sentence in Section > 9 of the draft to hightlight this consideration. > >> I also think that it can happen if I add a new device to an existing rank. > No, as long as there is enough address for this new device. > > Cheers, > Guangpeng > >> -----Original Message----- >> From: Michael Richardson <mcr+i...@sandelman.ca> >> Sent: Monday, August 22, 2022 12:07 AM >> To: Liguangpeng (Roc, Network Technology Laboratory) >> <liguangp...@huawei.com> >> Cc: Alexander Pelov <a...@ackl.io>; 6lo <6lo@ietf.org> >> Subject: Re: [6lo] Call for WG adoption of >> draft-li-6lo-native-short-address-03 >> >> >> "Liguangpeng (Roc, Network Technology Laboratory)" wrote: >>> Thanks for share of Carpenter's draft. I fully agree with the content >>> of it after a quick read. I think it's for all adoption process, not >>> only for this adoption call. I believe 6lo Chairs' professional >>> actions. >> >>> About the technical related concern: >>>> One concern that I have with NSA is that I think the network can get >>>> renumbered whenever there are new devices. >> >>> Can you explain a little more on how this problem happens? >> >> If I insert a new device in the tree, then all of the tree below that device >> has to >> renumber. >> I also think that it can happen if I add a new device to an existing rank. >> >> >> -- >> Michael Richardson <mcr+i...@sandelman.ca> . o O ( IPv6 IøT consulting ) >> Sandelman Software Works Inc, Ottawa and Worldwide >> >> >> > > _______________________________________________ > 6lo mailing list > 6lo@ietf.org > https://www.ietf.org/mailman/listinfo/6lo _______________________________________________ 6lo mailing list 6lo@ietf.org https://www.ietf.org/mailman/listinfo/6lo
