[Nml-wg] New version of the schema document
John Vollbrecht
jrv at internet2.edu
Mon Aug 24 16:00:50 CDT 2009
My mind was tricked into saying level instead of layer ins some places
- I fix them below. Sorry.
John
On Aug 24, 2009, at 4:15 PM, John Vollbrecht wrote:
> I have some comments on the schema - I talked a bit with Jeroen
> about these since he is in AA this month. I like the schema and
> that it is defining things so they can be discussed. I particularly
> like the definition of adaptation as being between ports at
> different layers - this explains it for me and implies that
> adaptation takes place between ports at different layers of the same
> device.
>
> I have other comments -
>
> 1) Jeroen says that there will be an introduction, and that it will
> define network- I just mention this.
> 2) I think that level
/ layer/
> should be a top level element. I think the reason it isn't there is
> that there was some confusion about whether the initial schema would
> be single or multiple level.
/ayer/
> 3) Subnet - the concept from G.800, 805 and 8080 should be
> included. Perhaps as a top level element or as a special group - I
> am not sure.
> 4) Ports should have relationship with groups, especially with
> subnetworks. They also have relationship with layer.
> 5) I think that there could be virtual ports similar to virtual
> nodes, so an implemented by relation would be appropriate. Jeroen
> may write this up more, but 8080 show virtual ports (SNPPs) and IDCs
> implement multiple next hops using VLAN groups on some edge ports.
>
> some smaller points -
> 6) I think link capacity should not be the only attribute in the
> schema. Perhaps something like "A Link MAY have additional
> attributes describing the performance, ownership, policy". A
> separate sentence might say that attributes that describe throughput
> MUST be in bytes per second rather than bits per second.
>
> 7) Link definition seems circular when describing it as a link :)
>
> John
>
>
> On Aug 21, 2009, at 3:55 PM, Jeroen van der Ham wrote:
>
>> Hello,
>>
>> I've just submitted a new revision of the schema document to the
>> subversion repository. Here's the changelog:
>>
>> - Added a short description of the Location and Lifetime objects
>> - Added a section enumerating all Relations. I've not called them
>> "Relations" throughout the text.
>> If need be, we can always make the names of Relations implicit in
>> the syntax.
>> - Added a section on Service, describing the way we currently see
>> adaptations? I welcome comments!
>> - The group section probably needs more work.
>>
>> I've updated the UML schema diagram to the latest version. I've
>> also added a note saying that this is not intended as endorsement
>> or finalizing, merely trying to reflect the current status.
>>
>> - Changed the Link group to Bidirectional Link as per the diagram.
>>
>>
>> The latest version of the PDF can be found in the subversion
>> repository. Unfortunately the web access to it seems broken at the
>> moment, so I'm attaching it to this mail.
>>
>> Jeroen.
>> <nml-base.pdf>_______________________________________________
>> nml-wg mailing list
>> nml-wg at ogf.org
>> http://www.ogf.org/mailman/listinfo/nml-wg
>
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