RE: [EFM-Copper] Correct frame delivery for multi-mac PCS
Thanks much Hugh, that certainly makes more sense. Based on the
reference you gave, I must have a back-level revision of the standard as
well.
Will use the comment forms in future, just didn't know whether I should
throw the question out first.
Thanks again,
Mark
-----Original Message-----
From: Hugh Barrass [mailto:hbarrass@cisco.com]
Sent: Friday, June 20, 2003 7:00 PM
To: Seery, Mark
Cc: stds-802-3-efm-copper@ieee.org
Subject: Re: [EFM-Copper] Correct frame delivery for multi-mac PCS
Mark,
I believe that you have misread that part of the draft. The PCS is
connected to the MAC (via MII in most cases), so there is always one PCS
and one MAC. Multiple PMIs may be connected to the same MAC (that's the
nature of aggregation). There is no way that any PMI can be connected to
more than one MAC
- which would be some form of trunking.
Take a look at 61.5.3
"the PMD Aggregate register for each MII shall be set such that each PMI
is only actively connected to at most one MII."
Thanks for taking such a close look at the standard, please feel free to
enter comments against the drafts - either yourself or via a Task Force
officer.
Hugh Barrass (EFM Vice Chair).
"Seery, Mark" wrote:
> Could someone help me with the following.
>
> If the PCS is connected to multiple MACs, upon reassembly of frames
> how does the PAF know which frames should be delivered to what MAC?
>
> Thanks,
> Mark