Re: [netmod] BBF extensions to ietf-entity

[Juergen Schoenwaelder <[e-mail]>]

On Tue, Sep 06, 2016 at 11:38:03AM +0200, Martin Bjorklund wrote:
> 
> I think there are two things that I am trying to understand:
> 
>   (i) Identification
> 
>       In order to be able to pre configure a component, the operator
>       needs a deterministic way to idenfity the component.  How
>       exactly is this done?
> 
>       One way is to rely on the name of the to-be-present component.
>       Another way is to identify its parent by name, and provide a
>       parent-rel-pos integer.  (The latter assumes that the parent's
>       name is known...)

For interfaces, some implementations carry the information where an
interface is physically located in the interface name. Others generate
(almost) dynamic interface names with no specific meaning (in the
worst case these names change on every reboot). I assume that the
first option works better in many cases. Of course, there are
conceivable situations where you like to bind pre-configuration to an
interface using other properties (e.g., here is an interface
pre-configuration that should be applied to whatever interface has a
certain MAC address) but to support such things one would need a way
more expressive binding mechanism (or a way to rename interfaces on
the fly, i.e., another layer of indirection).

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
Fax:   [phone]         <http://www.jacobs-university.de/>