Possibly recalling incorrectly here, but I believe Vista can function sans Link Local addressing. (IIRC - It tries, but doesn't care too much if it fails (due to DAD collision, for example) ...)
/TJ >-----Original Message----- >From: ipv6-boun...@ietf.org [mailto:ipv6-boun...@ietf.org] On Behalf Of Erik >Nordmark >Sent: Wednesday, June 10, 2009 1:39 PM >To: Prabhu Hariharan >Cc: ipv6@ietf.org >Subject: Re: Is Link-Local address mandatory for a host device? > >Prabhu Hariharan wrote: >> Hi, >> >> For a end-device (a host), if the interface connecting to IPv6 network >> is configured with IPv6 global address, then automatic configuration >> of link-local address is mandatory for that interface? Consider the >> host is being statically configured with IPv6 default gateway address. >> >> Without the presence of link-local address on interface, whether any >> functionality or IPv6 conformance issue would arise? > > From a conformance perspective I think the specs are clear that all >IPv6 interfaces must be assigned a link-local address. > > From the practical perspective of "what would break" we have: > >> So, for DAD it would use unspecified address (::) as source address, >> for Address resolution it would use the IPv6 global address, no need >> of router discovery / prefix discovery in this host and applications >> would use global address. In this case, presence of link-local >> address is necessary? > >I suspect that you also can't use DHCPv6 for non-addresses (finding the DNS >servers etc) since DHCPv6 might assume that some communication uses the link- >local address. But I haven't checked in the RFC. > > Erik > > >-------------------------------------------------------------------- >IETF IPv6 working group mailing list >ipv6@ietf.org >Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 >-------------------------------------------------------------------- -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
