On Wed, Aug 26, 2015 at 2:31 PM, Juliusz Chroboczek <[email protected]> wrote: >>> So if a route is flapping, hosts get or don't get an IP depending on the >>> exact time when they send a DHCPREQUEST or NS? Is that better than always >>> assigning an IP to hosts, and expecting ICMP to signal route flapping in >>> real time? > >> Are you talking about a route that is created and vanishes every few >> seconds or minutes? > > What I'm saying is that neither DHCPv4 nor IPv6 RA are designed to deal > with prefixes that last less than a few hours. See for example RFC 4862 > Section 5.5.3 paragraph e2. (That's just an example, there are other > reasons why yo-yo RAs are a bad idea.) > > Short-term reachability indications are sent to hosts in a reactive manner, > using ICMP unreachables. If any applications are unable to do the right > thing with ICMP unreachables, we should fix the applications.
I am not aware of any application doing anything more than "try to open the connection again". How do you propose the application to react? Most applications leave the source-IP selection to the operation system... does any OS currently change the preference order of IPv6 source prefixes when it gets ICMP unreachable messages? Henning Rogge _______________________________________________ homenet mailing list [email protected] https://www.ietf.org/mailman/listinfo/homenet
