Re: IPTOS_LOWDELAY in netinet/ip.h is incorrect??

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On Mon, 13 Aug 2001, Ben Greear wrote:

> "David S. Miller" wrote:
> >
> >    From: Ben Greear <greearb@candelatech.com>
> >    Date: Mon, 13 Aug 2001 08:43:52 -0700
> >
> >    I think that #ifdef code should be changed to check for the
> >    run-time enabled-ness of ECN.  Also, is there a way to turn
> >    ECN on/off for a specific socket only?
> >
> > Wrong, a host adhering to the ECN rfc designates the new meanings of
> > these bits.
>
> Fair enough, but when I specifically disable ECN through the /proc/ interface,
> then I should be able to set the bits as specified in 1349 or whatever.  It's
> not critical path code, so the extra if () check is meaningless, and the
> flexibility would be welcomed by me :)

um, RFC 1349 is obsoleted by RFC 2474, so those ECN bits stay. Since
they have now been officially allocated to ECN.
and Alexey fixed the code just fine many many moons ago.
Infact i would say Linux was probably the first ever to conform
to the RFC.
So recheck your coordinates.
If you are trying to get 802.1p to precedence/DSCP bit settings, i would
strongly recommend you use the CISCO mapping.

cheers,
jamal

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