> for link-local address RFC2472 exception makes sense, but for others
> it does not. i'd say keep node-req text as is. > > itojun Hmm.. OK, let's see what RFC2472 has to say about this: " As long as the Interface Identifier is negotiated in the IPV6CP phase of the PPP connection setup, it is redundant to perform duplicate address detection as a part of the IPv6 Stateless Autoconfiguration protocol [3]. Therefore it is recommended that for PPP links with the IPV6CP Interface-Identifier option enabled the default value of the DupAddrDetectTransmits autoconfiguration variable [3] be zero. " And what RFC2462 has to say: " For safety, all addresses must be tested for uniqueness prior to their assignment to an interface. In the case of addresses created through stateless autoconfig, however, the uniqueness of an address is determined primarily by the portion of the address formed from an interface identifier. Thus, if a node has already verified the uniqueness of a link-local address, additional addresses created from the same interface identifier need not be tested individually " In a PPP link the host autoconfigures the addresses (link/global) based on IID and Prefix configured/advertised by the AR. If the AR does not add IID config option in IPv6CP, the host can use it's unique link-layer ID if required (note that otherwise autoconfiguration stops). Besides the AR and the host there is no one on the link. Therefore running DAD (NS/NA) for any autoconfigured address (including autoconfigured global) is redundant for the point-to-point link, IMHO. Please explain why running DAD for an autoconfigured non-link local address based on IID received from IPv6CP and prefix received from RA makes sense to you. Regards, Kuntal -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
