Suresh Krishnan wrote:
Hi Folks,
Some RFCs (I know of at least 2, RFC2526 and RFC4214) reserve a set of
interface identifiers on all prefixes. These identifiers need to be
excluded when a node autoconfigures an address. This problem occurs with
privacy addresses but is equally applicable to other address assigment
methods like dhcpv6, cga etc. As Bernie suggested in a mail it would be
good to maintain a list of such identifiers. This is possible by either
listing the currently assigned IIDs in a document, or by creating an
IANA registry. The former is useful if there will be no such allocations
in the future and the later is useful if there will be future
allocations. I have written a draft regarding this and I was wondering
if the wg considers this to be useful work worth pursuing. I would also
like to know if there are any other RFCs/drafts which depend on using
specific IIDs.
Not sure whether Teredo 64bit Node Identifier qualifies as something to
be reserved by IANA, because it's variably derived from IPv4 address and
port number. But the same is true with ISATAP as well, and you consider
ISATAP.
I think two things are here:
-hardcoded IIDs: anycast rfc2526, maybe IPv6-over-linkswoMAC, other(?)
-list of methods to derive 64bit IIDs (EUI64, ISATAP, TEREDO, maybe
IPv6-over-foo, maybe others).
I think only the hardcoded IIDs can be concerned by IANA reservation.
The list of methods to derive 64bit IIDs is very good to maintain
centrally, it's useful knowledge to many local designs.
Finally, isn't rfc2526 anycast address already assigned by IANA?
Alex
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