On 8/13/2016 9:52 AM, David Allan I wrote: > > Hi Joe > > > > And the use case for wanting to do subnet emulation is….? >
You want the properties of a subnet and/or to emulate the behavior of a shared link, i.e., to limit the scope of various protocols, including IP routing, IPv6 automatic addressing, L2 address translation (virtualizing L2 underneath a virtual L3 is needed to support revisitation, where a single node participates multiple times in an overlay), and basically any subnet-based resource discovery. Joe > > > That‘s my question > > Dave > > > > *From:*Joe Touch [mailto:[email protected]] > *Sent:* Friday, August 12, 2016 8:20 PM > *To:* David Allan I <[email protected]> > *Cc:* [email protected]; Bocci, Matthew (Nokia - GB) <[email protected]> > *Subject:* Re: [nvo3] FW: Call for interest on NVO3 use case draft > > > > The typical use case is to support subnet emulation, e.g., a group of > links over which broadcast is emulated as with LANE. > > > On Aug 12, 2016, at 7:11 PM, David Allan I <[email protected] > <mailto:[email protected]>> wrote: > > My point would be that introducing additional complexity in an > overlay should have a use case associate with it. It would not be > something you would do gratuitously…. > > > > SO I’m looking for the draft to provide a use case for this vs. > simply mentioning subnetting without any context J > > > > Cheers > > Dave > > > > *From:*nvo3 [mailto:[email protected]] *On Behalf Of *Joe Touch > *Sent:* Friday, August 12, 2016 5:07 PM > *To:* David Allan I <[email protected] > <mailto:[email protected]>>; [email protected] > <mailto:[email protected]>; Bocci, Matthew (Nokia - GB) > <[email protected] <mailto:[email protected]>> > *Subject:* Re: [nvo3] FW: Call for interest on NVO3 use case draft > > > > > > > > On 8/12/2016 4:16 PM, David Allan I wrote: > > 4.2 Why I would subnet my overlay could use some explanation. > I normally think of subnetting as a convenient address > summarization technique dependent on topology, and with an > overlay I don’t have a topology. > > > The topology of an overlay is determined by its tunnels, just as > the topology of the underlying net is determined by its links. > > A subnet in an overlay corresponds either to a single multipoint > tunnel or to a set of tunnels that transparently acts as such - > just as a subnet in the Internet base network corresponds to a > shared access link or a set of links that transparently act as > such (e.g., switched ethernet). > > Joe >
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