Re: ECN

On Fri, 07 Nov 2008 08:27:58 +0100, Mikael Abrahamsson said:

for ECN to actually be useful, we (the ISPs) have to turn this option on in the routers as well. Is anyone doing this today? What vendors support it?

The only thing that's *required* for it to help is that the routers and firewalls not actually *molest* the bits in the TCP SYN packet. If you pass them and *do nothing else*, it at least has the potential of being useful at some other router along the path. And let's face it - if *your* router is congested enough for ECN to matter, there's a fairly good chance that the router one hop up/downstream is *also* seeing some effects. Even if *you* don't do anything else, your neighbor might - helping you out in the bargain.