Hi all, Unfortunately, I will not be able to attend the NSI and GLIF meeting coming week. Here is our (SURFsara) stand with regards to the current service discovery and topology distribution proposals. Summarizing John's proposal: - recursively flood discovery services info to neighbours - recursively flood topology files to neighbours We think that this is a major improvement over the current bootstrap document on Github used by AutoGOLE. We don't think it's perfect. Our main critique is: - there is no aggregation of topology - it requires full topology knowledge Our minor critique is: - scalability: long distribution path. Our preference would be that topology docs would be publicly available at each domain. (though we are aware that some organizations are reluctant to publish this information). - security: poor PKI. (none to speak of?) - flexibility: no distinction between identifiers and addresses We like to see a better infrastructure in the future, but will not pursue that for now (at least not before fall 2014). The reason is that we think it is better to gain more experience with (1) PKI and security aspects of non-central topology distribution; (2) experience how NSI interacts with other technologies, like OpenFlow (3) understanding the trade-offs of hierarchical addresses, and the distinction between identifiers and addresses. Concluding, we support John's proposal for discovery services and topology distribution as a solution that is good with the current scale and requirements of the NSI community, and hope to work with you on a better solution for the future. I wish you a fruitful meeting! Freek -- Freek Dijkstra | Group Leader & Network Expert | Infrastructure Services | SURFsara | | Science Park 140 | 1098 XG Amsterdam | +31 6 4484 7459 | | Freek.Dijkstra@surfsara.nl | www.surfsara.nl | Available on Mon | Tue | Wed | Thu |