Re: Link Status thoughts
Pat,
Would link_status be complete at the PCS? What if a
XAUI link was used to extend the XGMII? Does this
need any indication of the link from the PCS toward
the MDI? What about the case of a DTE XGXS turned
into a PCS because the PHY XGXS/PCS/PMA is really
only a retimer? Does the DTE XGXS not care about
signal_detect in one case but care about it in the
other?
All these cases show me a pretty confusing picture.
I'm hoping someone can enlighten all of us next
week :)
Ben
pat_thaler@xxxxxxxxxxx wrote:
>
> Ben,
>
> I've looked at your slides. I'm not sure if you intend all
> the signals shown coming out of blocks (especially those on
> slides 8 and 10) to be pins. If so, that is way too many
> pins for link status.
>
> What I propose is one pin from the PMD to the PMA indicating
> whether the link is good (that is, signal detect is okay on
> all inputs) or not. One pin from the PMA to the PCS/WIS
> indicating whether the receive link at the PMA and below
> is okay. That would be an AND of the signal it gets from
> the PMD and the PMA's lock signal. The WIS to PCS interface
> is only defined as a logical interface, so it would have
> a message defined to pass whether the link below was up -
> the AND of the signal it gets from the PMA and its frame
> sync acquired status.
>
> Pat
>
> -----Original Message-----
> From: Ben Brown [mailto:bbrown@xxxxxxxx]
> Sent: Thursday, October 26, 2000 8:44 AM
> To: 802.3ae
> Subject: Link Status thoughts
>
> Hey,
>
> After a discussion some of us had during the editorial
> meeting yesterday, I thought I'd put some of our thoughts
> down on paper. There are still quite a few questions
> buried in these slides. Anyone with comments, please
> feel free to share them. I'd like to have these comments
> before the November meeting so we can put a proposal on
> the table.
>
> Thanks,
> Ben
>
> --
> -----------------------------------------
> Benjamin Brown
> AMCC
> 2 Commerce Park West
> Suite 104
> Bedford NH 03110
> 603-641-9837 - Work
> 603-491-0296 - Cell
> 603-647-2291 - Fax
> 603-798-4115 - Home Office
> bbrown@xxxxxxxx
> -----------------------------------------
--
-----------------------------------------
Benjamin Brown
AMCC
2 Commerce Park West
Suite 104
Bedford NH 03110
603-641-9837 - Work
603-491-0296 - Cell
603-647-2291 - Fax
603-798-4115 - Home Office
bbrown@xxxxxxxx
-----------------------------------------