Re: [Ibnemo] How to group/reuse definitions

It's really useful to group a set of atomic components and provide the whole as a micro/template, just like the DMZ example. The hierarchy enables the reusability.
To describe a DMZ, I can see two ways.
1. One is to describe the exact connectivity among those atomic components. I think the switch and router are what we want to eliminate. It seems too detail with the intent concept. I hope they can be auto generated by the intent engine.
2. The other way I would prefer is to define DMZ as a layer 2 group, in which by default all the components are connected by a logic switch(which do not need to explicitly describe again). Or we can define DMZ as a layer 3 group with a  router. In this way, we can put any number of components in easily with fully flexibility.

That's my 2 cents.

Best,
Tianran

> -----Original Message-----
> From: Ibnemo [mailto:ibnemo-bounces@ietf.org] On Behalf Of Bert Wijnen
> (IETF)
> Sent: Thursday, November 05, 2015 5:41 PM
> To: ibnemo@ietf.org
> Subject: [Ibnemo] How to group/reuse definitions
> 
> During the IETF94 Hackaton, we got some discussion on how much detail we
> want to allow or need in the Intent Language when reusing definitions. For
> example, let us assume that you
> 
> - define a router
> - define a firewall
> - define a loadbalancer
> - define a l2 switch
> - etc
> 
> And that later on you want to define something like a DMZ and inside that
> DMZ you want to use the defined router, firewall, l2 switch, etc.
> 
> The end-user/customer would want to just express his/her intent to have
> an internet connection with a DMZ I guess.
> 
> The network administrator of the ISP (operator) needs to then express that
> the DMZ consists of let us say a router, a firewall, a l2switch etc.
> Do we want/need the network administrator to have to (or to be able to)
> specify the details on how these nodes get connected? Or would we rather
> see that the Intent Engine generates the proper connections?
> 
> I suggest that those who have proto-type implementations express their
> approach and that network operators express their wants/needs for such a
> scenario.
> 
> Bert
> 
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