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Date: Thu, 23 Jun 2016 22:15:34 +0200
Cc: Greg White <g.white@CableLabs.com>,
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Subject: Re: [Codel] Per-Paket-Overhead in DOCSIS networks
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Hi Greg, hi Jonathan,


> On Jun 23, 2016, at 20:59 , Jonathan Morton <chromatix99@gmail.com> =
wrote:
>=20
>=20
>> On 23 Jun, 2016, at 21:51, Greg White <g.white@CableLabs.com> wrote:
>>=20
>> For downstream packets, the DOCSIS MAC header consists of the =
standard 6-byte MAC Header, plus 6 bytes for the DS EHDR and 5 bytes for =
the Downstream Privacy EH Element.   So, 17+14+4=3D35 bytes of =
per-packet overhead for a downstream DOCSIS MAC Frame.  For upstream =
packets, there will typically be only the 6-byte MAC Header, plus the 4 =
byte Upstream Privacy EH version 2 Element, so 10+14+4=3D28 bytes of =
per-packet overhead for an Upstream DOCSIS MAC Frame.
>=20
> Thanks Greg, this is useful information for me to build into my next =
overhead model update.

	I fully agree, thanks a lot! Note to self, now it is clear that =
upstream and downstream overhead need independent entry fields=E2=80=A6

Best Regards
	Sebastian


>=20
> - Jonathan Morton
>=20