Re: [tcpm] Fwd: Probing the viability of TCP extensions

"Scheffenegger, Richard" <rs@netapp.com> Tue, 22 June 2010 23:14 UTC

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From: "Scheffenegger, Richard" <rs@netapp.com>
To: "Lars Eggert" <lars.eggert@nokia.com>, "Multipath TCP Mailing List" <multipathtcp@ietf.org>, <tcpm@ietf.org>
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Cc: Hannes Tschofenig <hannes.tschofenig@nsn.com>
Subject: Re: [tcpm] Fwd: Probing the viability of TCP extensions
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Adam is a member of the TCPM list :)

I am curious, out of the 1,07% of Hosts where ECN negotiation was
successful, is there any indication that internet routers are actually
making use of the ECT / CE codepoints in the IP header?

Ie. When loading a page from those web servers, were any CE marked
segments received?

Or is ECN only negotiated between hosts, but never actually used to
deliver a benefit (which might explain the extremely low adoption rate
almost 10 years after standardization.

Also, your research was done in 2008 - Microsoft has introduced ECN
support with Windows Vista / 7, is there any indication of rising levels
of public ECN support, or still a falling trend?

I'm asking as there seems to be renewed interest in having
ECN-singalling in private networks again...

Best regards,

Richard Scheffenegger

 

> -----Original Message-----
> From: Lars Eggert [mailto:lars.eggert@nokia.com] 
> Sent: Dienstag, 22. Juni 2010 21:52
> To: Multipath TCP Mailing List; tcpm@ietf.org Extensions
> Cc: Hannes Tschofenig
> Subject: [tcpm] Fwd: Probing the viability of TCP extensions
> 
> Thanks for the link, Hannes!
> 
> Begin forwarded message:
> > From: "Tschofenig, Hannes (NSN - FI/Espoo)" 
> > <hannes.tschofenig@nsn.com>
> > Date: June 22, 2010 22:45:28 GMT+03:00
> > To: "Eggert Lars (Nokia-NRC/Espoo)" <lars.eggert@nokia.com>
> > Subject: Probing the viability of TCP extensions
> > 
> > FYI: http://www.imperialviolet.org/binary/ecntest.pdf
> > 
> 
>