Mark Andrews wrote: > > Dave Cridland writes: > > > > Happy eyeballs - try everything as soon as you can, in parallel. Drop > > everything else when one does. > > More correctly it is try the first address and if that doesn't > connect in a short period (150...250ms) start a second connection > to the next address while continuing with the first. If you have > more that 2 address you do something similar for the next one (I > use 1/2 the original timeout, but that is a implementation detail). > You continue to use the address that works for that session. You > drop any other connections to other addresses that complete.
Happy eyeballs means that a clients reaction to congestion is to perform an DoS attack, flood the network with additional connection requests and hammer the server with many additional half-open connections that will never actually get used. While this might currently "improve" the end user experience of clients, it simultaneously adds a deterrant to server operators to announce IPv6 addresses (even multiple IP addresses -- they're better of with IPv4 NAT if they have multiple servers at a single location). -Martin _______________________________________________ Ietf mailing list [email protected] https://www.ietf.org/mailman/listinfo/ietf
