ietf
[Top] [All Lists]

Re: [hybi] Last Call: <draft-ietf-hybi-thewebsocketprotocol-10.txt>

2011-07-28 21:39:53
Mark Andrews wrote:

Martin Rex writes:

Mark Andrews wrote:

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

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.

It is not a DoS attack.  The client is almost certainly going to
make those connection attempts anyway if the path is congested
enough to cause the first connection attempt to fail.  The only
difference is the application gives up in 30 seconds rather than
60 or 90 seconds by doing the attempts serially.

150...250ms  ?!

For a satellite link you already have started 3 parallel connects
in non-congested(!) situations. 

just some random IPv4 pings from my office (in germany)
_without_congestion_:

   ping  www.asus.com.tw            300-380ms
   ping  south-america.pool.ntp.org 280-370ms
   ping  oceania.pool.ntp.org       340-420ms
   ping  www.eff.org                160-170ms
   ping  www.ietf79.cn              330-450ms
   ping  www.ietf76.jp              270-370ms

So your approach is already hurting the network without congestion!

-Martin
_______________________________________________
Ietf mailing list
Ietf(_at_)ietf(_dot_)org
https://www.ietf.org/mailman/listinfo/ietf

<Prev in Thread] Current Thread [Next in Thread>