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Re: Hari


Hari can easily be adapted to the same word-by-word pacing mechanism we
proposed for the XGMII. This mechanism adds a signal to Hari which is used
to request the insertion of NULL control words. When pacing from PMD to
Hari NULL control works can be inserted.

Hari has no bias toward open loop pacing.



At 01:46 PM 11/25/99 -0800, Ariel Hendel wrote:
>> Date: Wed, 24 Nov 1999 18:44:12 -0600
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>> Rich,
>> As a XGMII, replacing the parallel GMII, Hari would be in place to
directly interface
>> between the MAC and PCS.  As an interconnect between the PMA and the
PMD, Hari adds
>> additional code translations, jitter, and inherent delay between any
pacing function at
>> the PMD level PCS and the MAC.  
>There can be no better example than Hari for the wisdom of the open loop
>solution at the MAC (as opposed to tightly coupled feedback schemes).
>Open loop pacing and Hari, made for each other...
>Ariel Hendel
Paul A. Bottorff, Director Switching Architecture
Enterprise Solutions Technology Center
Nortel Networks, Inc.
4401 Great America Parkway
Santa Clara, CA 95052-8185
Tel: 408 495 3365 Fax: 408 495 1299 ESN: 265 3365
email: pbottorf@xxxxxxxxxxxxxxxxxx