[Iccrg] RE: Iccrg Digest, Vol 44, Issue 6

[Mikael Abrahamsson]

On Thu, 30 Jul 2009, Ingemar Johansson S wrote:

> To me "ECN not-supported in the routers (or whatever)" can mean two
> things
>
> 1) The ECN bits are ignored and left unchanged
> 2) The ECN bits are zeroed.

To me something that zeroes ECN bits when doing packet forwarding when it 
doesn't understand them is broken.

> So my question is what kind of behavior (1 or 2) is to be expected from 
> e.g core routers that don't support ECN ?

1. It does it's thing completely ignoring (and leaving unchanged) all 
information regarding ECN.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se