Subject: RE: [ipfix] Exporting Control Information

From: "Reinaldo Penno" <[email-masked]>
Date: Tue, 17 Jun 2003 13:14:24 -0700

okay. fair enough.

-----Original Message-----
From: Ganesh Sadasivan [mailto:[email-masked]] 
Sent: Tuesday, June 17, 2003 4:12 PM
To: Penno, Reinaldo [BL60:SB20:EXCH]
Cc: [email-masked]
Subject: Re: [ipfix] Exporting Control Information

Reinaldo Penno wrote: 

How about we simplify even more? IMO we could do away with the "reaches". We
just say that it has to be reliable and one of the methods is using a
reliable transport. If someone has a different method but it is also
reliable then it is okay. 

   For the reasons 1. and 2., the export of the control information 
   SHOULD be done reliably.

I initially wrote this sentence before sending the e-mail. But this sentence
is 
partial in the sense that it does not talk about the receiver getting
information 
reliably. So is it not prone to mis-interpretation? 

-ganesh 

   One way to achieve this would be  to send the control 
   information over a reliable transport. 

> -----Original Message----- 
> From: Ganesh Sadasivan [mailto:[email-masked]
<mailto:[email-masked]> ] 
> Sent: Tuesday, June 17, 2003 3:45 PM 
> To: Penno, Reinaldo [BL60:SB20:EXCH] 
> Cc: [email-masked] 
> Subject: Re: [ipfix] Exporting Control Information 
> 
> 
> Hi Reinaldo, 
> 
>    I agree that the statements are fuzzy. How about this one? 
> 
>   For the reasons 1. and 2., the export of the control information 
>   SHOULD be done such that the it reaches the collector reliably. 
>   One way to achieve this would be  to send the control 
>   information over a reliable transport. 
> 
> Thanks 
> Ganesh 
> 
> Reinaldo Penno wrote: 
> 
> > Hello Ganesh, 
> > 
> > I guess everything looks okay except number 3...Some comments 
> > 
> > You say that is it preferred that the export de done over a 
> reliable 
> > connection. Do you mean IPfix connection? If it the 
> "preferred" method 
> > I guess a SHOULD would be more appropriated. 
> > 
> > Using terms like "partially reliable" could be opening a can of 
> > worms...What is a partially reliable transport? And what 
> you mean that 
> > the network is reliable? 
> > 
> > Anyway, my overall suggestion is to rewrite number 3 to 
> make it less 
> > ambiguous and open to interpretation. 
> > 
> > regards, 
> > 
> > Reinaldo 
> > 
> > >      3. For the reasons 1. and 2. it is preferred that 
> the export of 
> > >         Control Information be done over a reliable 
> connection. This 
> > > MAY 
> > > 
> > >         be done through a reliable transport or a 
> partially reliable 
> > >         transport when the underlying network is reliable. 
> > 
> > ----- Original Message ----- 
> > From: "Ganesh Sadasivan" <[email-masked]> 
> > To: <[email-masked]> 
> > Sent: Monday, June 16, 2003 3:35 PM 
> > Subject: [ipfix] Exporting Control Information 
> > 
> > > Hi, 
> > > 
> > >    The following text describes the architecture for 
> exporting control 
> > >    information. The protocol should have it own section 
> on this topic. 
> > >    Please let me know your thoughts on the paragraphs below. 
> > > 
> > > Exporting Control Information 
> > > 
> > >    The Control Information is used by the collector to : 
> > >    - decode and interpret flow records. 
> > >    - understand the exporter state. 
> > > 
> > >    As such sending control information from exporter in a 
> timely and 
> > >    reliable manner is critical to the proper 
> functionality of the IPFIX 
> > >    collector. The following approaches MAY be taken for 
> the export of 
> > >    control information. 
> > > 
> > >      1. Send all the control information pertaining to 
> flow records 
> > >         prior to sending the flow records themselves. 
> This includes any 
> > >         incremental changes that happens to the 
> definition of the flow 
> > >         records. 
> > > 
> > >      2. Notify on a near real time basis the state of the 
> exporter to 
> > >         the collector. This includes all the changes like a 
> > >         configuration change that affects the flow 
> behavior, changes to 
> > >         exporter resources that affects export rates, etc 
> that which 
> > > the 
> > > 
> > >         collector needs to be aware of. 
> > > 
> > >      3. For the reasons 1. and 2. it is preferred that 
> the export of 
> > >         Control Information be done over a reliable 
> connection. This 
> > > MAY 
> > > 
> > >         be done through a reliable transport or a 
> partially reliable 
> > >         transport when the underlying network is reliable. 
> > > 
> > > Thanks 
> > > Ganesh 
> > > 
> > > 
> > > 
> > > -- 
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