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
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