On Wed., 26 Sep. 2018, 16:10 Ole Troan, <otr...@employees.org> wrote:
> Davey, > > If we’re discussing host based versus network based happy eyeballs, would > it be naive to think that the network based HE would interfere with the > client’s HE? > > A router knows very little about end to end properties of a connection. It > could of course do those measurements by looking deeply into packets, but > it would still be restricted to it’s own topological location. Compare that > with the data available to an MP-TCP host stack. > > And note I think HE can’t just be between v4 and v6, but between all the > candidate connections between source and destination. > Yes, multipathing (+ encryption) has a lot of impacts on what is possible to do and commonly done on the network today. A lot of those activities would have to be shifted to the host. Start at slide 63 - http://www.users.on.net/~markachy/The_Rapid_Rise_of_the_MMHH.pdf I can't seem to find it now, however I think Fred Baker wrote a draft a number of years ago that observed that multi-addressing on a single interface is also a form of multi-homing, meaning that it isn't a requirement for a "multi-homed" host to have multiple interfaces attached to multiple and different networks. That means most IPv4 hosts, and all IPv6 hosts, by design, are potential multi-homed hosts. Regards, Mark. > Cheers, > Ole > > On 26 Sep 2018, at 04:49, Davey Song <songlinj...@gmail.com> wrote: > > But in the general case the network cannot. >> Think host multi-homing. >> > > Yes or no. > > Generally speaking the races of IPv6 and IPv4 connections on both network > and client are going to be suffered by netowrk dynamics, including > Multi-homing, route flaps, roaming, or other network falilures. Extremely, > a client can get a better IPv6 connection in one second (when IPv6 win the > race), and lose it in next second. In such case, more sophisticated > measurement should be done(on client or network) , for a longer period, on > statistics of RTT and Failure rate, or combinations of them. But in IMHO, > the assumption of HE is relatively stable network for short exchange > connections. The dynamics exits but relatively rare or no notable impact on > HE. So I see no such discussion in RFC8035. > > Davey > > _______________________________________________ > v6ops mailing list > v6...@ietf.org > https://www.ietf.org/mailman/listinfo/v6ops >
_______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
