> Are uSID values going to be entirely pseudo-random? I see no reason why not ...
Networks are managed by some form of NMS. NMS can generate such values and abstract it with a "node_name_usid" string for any additional processing and human abstraction. If that is the only concern I think we are done then. The only issue is that if you happen to have hierarchical IGP you will not be able to summarize them - but I don't think that this would be a showstopper to any deployment. Best, R. On Mon, Sep 2, 2019 at 12:24 PM Mark Smith <[email protected]> wrote: > > > On Mon., 2 Sep. 2019, 17:58 Robert Raszuk, <[email protected]> wrote: > >> Hi Mark, >> >> >>> The uSID proposal is taking the position that all the bits after the >>> high order prefix are available for any purpose. This is not correct, and >>> would violate a number of standards track RFCs, including the IPv6 >>> Addressing Architecture RFC (RFC 4291) and the ULA RFC (RFC 4193). >>> >>> In particular, 40 bits of a ULA prefix, between /8 and /48, the Gobal >>> ID, must be pseudo random. This is the most critical property of ULA >>> addresses and prefixes, as it is the solution to the problem ULAs are >>> designed to solve. >>> >> >> RFC 4193 says about Global_ID allocation: >> >> The local assignments are self-generated and do not need any central >> coordination or assignment, but have an extremely high probability of >> being unique. >> >> > Are uSID values going to be entirely pseudo-random? > > " > > 3.2.1 <https://tools.ietf.org/html/rfc4193#section-3.2.1>. Locally Assigned > Global IDs > > Locally assigned Global IDs MUST be generated with a pseudo-random > algorithm consistent with [RANDOM > <https://tools.ietf.org/html/rfc4193#ref-RANDOM>]." > > > >> So in some the case operator may choose to make such "local assignment" >> of Global ID to be per router not per network. And that is all what is >> needed for uSID. uSID address blocks does not need to be continues. >> >> It also does not contradict with any RFC does it ? What breaks if I use >> more then one self generated Global ID in my network ? >> >> Note that the above question goes way beyond any SR related discussion so >> perhaps deserves a separate 6man thread. >> >> Best, >> R. >> >>
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