> We have two nodes, a "SEND node" and a "DIID node". > > SEND node: > - (for simplicity) do not implement the DIID-style optimization > - have an (e.g.,) EUI-64 based interface identifier, I. > - configure a SEND (CGA) address P:A (where A is the identifier, A != I) > > DIID node > - implement the DIID-style optimization > - (for simplicity) do not implement SEND > - happen to have A as an interface identifier > > The SEND node comes to a link. It perform DAD for both fe80::I and > P:A, and confirms that these are unique. >
No, the SEND node performs DAD for fe80::C, where C is a function of the key and some other parameters. The prefix on LL addresses is also calculated from the key. > Then the DIID node comes to the same link. It performs DAD for > fe80::A, and confirms it is unique. So the DIID node start using > P:A without doing DAD while P:A is actually duplicate. > Yes, that's the concern. If the DIID node comes on the link second, then it will assume that A is a unique prefix even though it only DADs it for the LL address. jak -------------------------------------------------------------------- IETF IPv6 working group mailing list [EMAIL PROTECTED] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------