[Nml-wg] Metrics for pathfinding

[Roman Łapacz]

W dniu 2013-06-06 16:51, Paul Boven pisze:
> L.S.,

Hi Paul, all,
>
> In the current version of the NML specification, as presented today at 
> the GLIF/OGF meeting, I noticed that there is no provision for 
> assigning metrics to links or ports. To support pathfinding in NSI 
> (which uses NML for its topology description), it would be very useful 
> to include attributes for such metrics. Without any such information, 
> intercontinental links are just as likely to be used in an NSI path as 
> local links, which would be a waste of scarce international bandwidth.
>
> At first glance, I would suggest adding attributes such as length, 
> weight (preference) and bandwidth - as NML is extensible, should such 
> extensions be coordinated by the NML-WG, or extensions that NSI 
> themselves could create? Given the basic nature of these attributes, 
> it would probably be best to have them centrally registered, to 
> prevent multiple, incompatible versions (Length in m or km? Bandwidth 
> in b/s or Mb/s?) from occurring.

I think NML should only focus on topology description but your proposal 
could be considered by the NM WG. The current NML could be used by NM.

Kind regards,
Roman

>
> Regards, Paul Boven.
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