Brian, you're quite right. I had in mind only one particular class of IID.
Washam, see Appendix A of RFC 4291 regarding modified EUI-64 IIDs with "u"=0. Also, RFC 3041 has been obsoleted; see RFC 4941 and its errata if privacy issues apply in your situation. -K- On Fri, Jul 15, 2011 at 6:25 PM, Brian E Carpenter < [email protected]> wrote: > The authors of RFC 4291 chose not to use the upper case normative > keyword convention defined in RFC 2119. Therefore, 'required' means > what in means in plain English (i.e. REQUIRED in RFC2119ish). > > Brian > > On 2011-07-15 19:03, Washam Fan wrote: > > Hi, > > > > I quoted this paragraph from RFC4291: > > > > For all unicast addresses, except those that start with the binary > > value 000, Interface IDs are required to be 64 bits long and to be > > constructed in Modified EUI-64 format. > > > > But I am not sure how to interpret the text in a correct way. > > > > If I assign an ordinary unicast address (except reserved anycast > > addresses mentioned in RFC5453) to an interface and the address > > doesn't start with 000, MUST the prefix be 64 bits? MUST the IID be > > constructed in Modified EUI-64 format? > > > > We are providing WebUI for our customer to manually assign IPv6 > > addresses, we want to do hygiene check before the actual move. > > > > Thanks in advance > > washam > > -------------------------------------------------------------------- > > IETF IPv6 working group mailing list > > [email protected] > > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > > -------------------------------------------------------------------- > > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > [email protected] > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- >
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