Subject: FW: clarifications needed on FACT

From: "Putzolu, David" <[email-masked]>
Date: Sun, 1 Dec 2002 09:44:56 -0800

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-----Original Message-----
From: [email-masked] [mailto:[email-masked]] 
Sent: Friday, November 22, 2002 10:47 AM
To: [email-masked]
Cc: [email-masked]; [email-masked]; [email-masked]
Subject: Re: clarifications needed on FACT

------------------ Hi Robert,

A CE-SET seems to me to be a way to represent a logical network element
(NE), which is a group of CEs and FEs cooperating together to provide the
functionalities of a 
router. And FE belongs to a CE-SET after it has succefully 
joined that set. In short, this number is used to track the CE/FE grouping
and all interractions between CEs and FEs in a group. As such, an FE-SET
doesn't seem to carry much importance.

On the message type question, I don't think there was a 
conscious effort to link message type and message flow direction. Such
linking would be co-incidental.

The draft is still evolving, and  updates to address SETUP message inclusion
will be made in the next update.

FE-CE associations are made to provide the required level of redudancy, as
set by configuration. So, it could be one-to-one or one-to-many, or
many-to-many. 

Regards,
Al.
 
>
>-------- Original Message --------
>Subject: clarifications needed on FACT
>Date: Tue, 19 Nov 2002 20:10:34 +0100
>From: Robert Haas <[email-masked]>
>Reply-To: Forwarding and Control Element Separation 
><[email-masked]>
>Organization: IBM Research Lab
>To: [email-masked]
>
>Hi,
>In my attempt to understand the FACT proposal, I would appreciate a few 
>clarifications from the authors:
>
>1) how are CE-sets meant to be used, and why is there no FE-set 
>equivalent ?
>2) why rely on the message type to infer in which direction the message 
>is going (FE-to-CE or CE-to-FE) ?
>3) why is the association SETUP message not described in the draft ?
>4) are FE-CE associations (or logical connections) always made of one 
>FE and one CE only ?
>
>With many thanks,
>
>--
>Robert Haas
>IBM Zurich Research Laboratory
>Säumerstrasse 4
>CH-8803 Rüschlikon/Switzerland
>phone +41-1-724-8698  fax +41-1-724-8578  
>http://www.zurich.ibm.com/~rha
>