> On 23 Jun, 2016, at 21:51, Greg White <[email protected]> wrote:
> 
> 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=35 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=28 bytes of per-packet overhead for an Upstream DOCSIS 
> MAC Frame.

Thanks Greg, this is useful information for me to build into my next overhead 
model update.

 - Jonathan Morton

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