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From: "Spenst, Aleksej" <Aleksej.Spenst@harman.com>
To: "'freebsd-pf@freebsd.org'" <freebsd-pf@freebsd.org>
Date: Wed, 22 Dec 2010 12:59:50 +0100
Thread-Topic: why ALTQ must be supported by interface drivers?
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Subject: why ALTQ must be supported by interface drivers?
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Hi All,

at what network level is ALTQ (QoS) implemented? At the IP level or at the =
driver level?

I would think that all queuing functionality is probabliy working at the IP=
 level and should not depend on underlying interfaces. Is that correct? If =
this is true, I don't understand why ALTQ must be supported by interface dr=
ivers? If I understand it correctly: (1) the driver has to support ALTQ. (2=
) the driver has to be compiled as ALTQ-aware with some special flags.

Thanks,
Aleksej.