Re: [alto] extension questions and comments

["Reinaldo Penno (repenno)" <[e-mail]>]

I also think seedorf-lmap is a very interesting draft.

But what I'm most interested in a way to make maps writable.  I want an app to be be able to write to a map therefore influencing its own cost and attributes.

From: Greg Bernstein <[e-mail]<mailto:[e-mail]>>
Date: Monday, October 28, 2013 10:48 AM
To: "[e-mail]<mailto:[e-mail]>" <[e-mail]<mailto:[e-mail]>>
Subject: [alto] extension questions and comments

Hi ALTO extension folks, as I'll not be making it up to Vancouver :-( , here are some questions/comments.
These comments/questions are from the perspective of creating an ALTO topology service (suitable for large bandwidth and SDN applications).

http://tools.ietf.org/html/draft-scharf-alto-vpn-service-01
ALTO for VPNs: Way back when we started talking about "topology" like extensions. The concept of ALTO for "controlled or partially controlled" environments was floated. It seems that a VPN type of service would be the exemplar of such an environment and hence pave the way for "restricted environment" use of ALTO.  Questions:  Are there specific additions to the REST API to offer this some kind of security, i.e., to keep others from gaining information about a customers VPN? Or would a general approach to security of this interface be specified?
http://tools.ietf.org/html/draft-song-alto-overlay-routing-00
Extensions for Multiple path choices: In our large bandwidth work we considered both path representations as well as graph representations. This proposal would extend ALTO by reporting costs on multiple possible paths between a source and destination. Hence could also work for the large bandwidth case with appropriate extensions.  Both in this draft and the VPN draft, we may have the situation where the client uses ALTO information to not only make a choice but then relay that choice back to the network via some type of "reservation interface".
http://tools.ietf.org/html/draft-wu-alto-te-metrics-00
Defines costs metrics based on OSPF-TE. We would need for such metrics for the "general" topology service.
http://tools.ietf.org/html/draft-roome-alto-pid-properties-00
PID properties -- Comments: This is a step on the way to a "NID" that we would use in a graph topology (multi-switch) representation, i.e., where we'd define a Node with Id and properties.
http://tools.ietf.org/html/draft-seedorf-lmap-alto-02, http://tools.ietf.org/html/draft-seedorf-cdni-fci-alto-00
Very interesting applications. Any interest from the authors of these drafts in bandwidth/topology type information?

Best Regards

Greg B.


On 10/22/2013 1:02 PM, Vijay K. Gurbani wrote:
Folks: As you prepare slides, etc. for your ALTO extensions, please
consult the latest institutional memory on how to taxonomize or classify
the extensions; this was captured rather succinctly and successfully
during the Berlin IETF side meeting [1].

Enrico and I will be looking to see how we can group the various
extensions under this ontology.  It will make it tractable to understand
and appreciate the extensions as we grapple with them.

Thanks,

[1] http://www.ietf.org/proceedings/87/minutes/minutes-87-alto#ad-hoc

- vijay



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Dr Greg Bernstein, Grotto Networking [phone]