On 02/08/2013 01:26, Scott Brim wrote: > On 08/01/13 14:31, Keith Moore allegedly wrote: >> There are many people (in IETF and elsewhere) who believe that >> applications should never use IP addresses directly or in referrals to >> other applications. This is often cited as if it were some >> architectural principle - in fact just last night, I actually had an AD >> state that to me as if it were a principle. I happen to disagree >> emphatically with that supposed principle, for many reasons, but I won't >> list those reasons here. > > You may have to if you want to press your case.
Some of Keith's arguments on this point were captured in draft-carpenter-behave-referral-object-01, but that draft also contains the statement: " In some cases, this problem may be readily solved by passing a Fully Qualified Domain Name (FQDN) instead of an IP address. Indeed, that is an architecturally preferred solution [RFC1958]. " That's indeed what RFC 1958 says. >> For the moment it only matters that there is >> a widely held belief that all applications should only use names to >> refer to hosts or application endpoints. From that point-of-view, all >> hosts/nodes need to have names, so (by this definition) all hosts/nodes >> need to have public addresses. > > All sources of Internet public services need to have DNS names, but > that's it. Other than that, "names" are only needed in higher layer > communications, and can be handled there. For example, your laptop > doesn't need a name to open communication with a SIP server, but once it > does it can use one or more SIP-level identifiers for its end of the > SIP-level communication. It can, but applications can get into trouble for a whole lot of reasons discussed in the above draft and its successors (draft-carpenter-grobj-reqts and draft-carpenter-referral-ps). Brian -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
