>-----Original Message----- >From: [email protected] [mailto:[email protected]] On Behalf Of Brian Haberman >Sent: Friday, October 16, 2009 1:35 PM >To: Margaret Wasserman >Cc: [email protected] >Subject: Re: Are IPv6 auto-configured addresses transient?
>I *think* that Vijay is asking a more general question about >applications rather than how to get IPv6 addresses (or service). If I >interpreted his earlier comments correctly, he is asking what does an >application know about an address that it is using. For example, if >Vijay's application is long-lived would it be affected by an address >becoming deprecated and no longer reachable. In this case, the address >stays reachable for some period of time until the deprecated prefix is >removed from the routing system. I don't see any problem here. Till a specific long-lived application screw case is described, I am not convinced the app needs to know anything related to lifetimes of addresses. On an IPv6 node, if anything related to the addresses on a network interface changes, the changes will affect the network interfaces the app is using. Even in IPv4, if an app is using an IP address of a network interface on the node, the app tracks changes of the IP address on the network interface - so IPv6 apps should do the same. >I suppose there is a related question as to how an application that uses >IP addresses in referrals should behave. Would an application find it >useful to know the lifetime associated with the auto-configured addresses? It may make sense that referrals for IPv6 do not merely use IP addresses but switch to using a PIO (Prefix Information Option from RFC 4861) per address. The PIO contains the Prefix Lifetime. Hemant -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
