[Iccrg] RE: [tsv-area] Testing ECN support for UDP flows

[Ingemar Johansson S]

Hi

Thanks for the input, seems like it is just an unnecessary complication to run on an MS-Windows PC. 

/Ingemar

> -----Original Message-----
> From: p.ohanlon at gmail.com [mailto:p.ohanlon at gmail.com] On 
> Behalf Of Piers O'Hanlon
> Sent: den 21 augusti 2009 11:40
> To: Ingemar Johansson S
> Cc: tsv-area; iccrg; Colin Perkins; carlberg; Mikael Abrahamsson
> Subject: Re: [tsv-area] Testing ECN support for UDP flows
> 
> 2009/8/21 Mikael Abrahamsson <swmike at swm.pp.se>:
> > On Fri, 21 Aug 2009, Ingemar Johansson S wrote:
> >
> >> Tried with an MS-Windows version of tracert (ftrace), it 
> was supposed 
> >> to be able to set the ToS field. However it seems like when I run 
> >> wireshark that the modified ToS field does not stick, it could be 
> >> some Windows specific feature that simply clears the ToS field. I 
> >> will try some traceroute tests on our Linux boxes next 
> week when I really start working.
> >> It could be that this will do.
> >
> > http://technet.microsoft.com/en-us/magazine/2007.02.cableguy.aspx
> >
> > In some versions of Windows you have to change the registry to be 
> > allowed to set any TOS bits, perhaps this is what's missing?
> >
> Yes and as Jonathon Lennox pointed out in the AVT WG it's no 
> longer possible  to set the TOS bit directly in Vista (the 
> registry tweak no longer works) as mentioned in the above 
> article. It seems one has to use their QoS APIs and I don't 
> think they allow you to touch the ECN bits.
> 
> Piers
> 
> > --
> > Mikael Abrahamsson    email: swmike at swm.pp.se
> >
>