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Subject: Re: [Bloat] Applying RED93 in south africa
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On 05/28/2011 04:02 PM, Juliusz Chroboczek wrote:
>> ecn is not being negotiated on tcp connections to SA(??),
> That's unfortunately pretty common.  A common practice is to clear any
> priority information in packets coming into your network; unfortunately,
> a lot of routers clear the whole DSCP byte, including the ECN bits.
>
There is some data on this in Bauer and Beverly's Caida workshop results:

http://gettys.wordpress.com/2011/02/22/caida-workshop-aims-2011-bauer-and-beverly-ecn-results/

It looks like *most* networks don't clobber the bits, though some do.  
So far, the networks who clobber the bits have been helpful on fixing them.
                     - Jim