Hi Eric, > If part of evaluating the applicability of dns-discovery > is based on it being mandated to be the last resort, then it > seems like there had better be a standard non-last resort which > is tried before the last resort. Otherwise the statement > about "last resort" > is vacuous and should be removed from the document.
Well, either we should remove it, or add clarification on why it should be a last resort (see further comments below). > Assuming that the statement stays in the document ... > Saying that devices which implement DNS discovery MUST also implement > a manual configuration method, and only if that manually configured > stuff is not set (or fails?) does it fall back to using dns-discovery, would > give some meaning to "last resort". I agree. > But that would place a rather strict requirement on minimal IPv6 > implementations since they would need a mechanism to enter the manual > information. While cell phones might have ways to manually > configuring this > that doesn't require a user keying in IPv6 addresses on a keypad, an > IPv6 toaster doesn't have such a mechanism. > Hence for some devices it might make more sense to require DHCP as the > non-last resort. I think that text that states either DHCP or manual configuration MUST be supported would be best. > So perhaps requiring either a DHCP method or a manual configuration > (where the latter might imply a keypad) is the way to provide > meaning to "last resort". Should we do this in this document, or elsewhere? My thinking is that text along the lines of: This mechanism is not meant as a primary means for obtaining DNS addresses and should be used as backup. DHCP and/or manual configuration are recommended as primary mechanisms. And then in some document (perhaps the node requirements) we could have text discussing what is mandated, etc. John -------------------------------------------------------------------- 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] --------------------------------------------------------------------
