Greg Bernstein Young Lee Comparison of the “Research Proposal for Cross Stratum Optimization (CSO) between Data Centers and Networks” to other IRTF/IETF efforts Greg Bernstein Young Lee March 2011 IETF 80, Prague Czech Republic

IETF 80, Prague Czech Republic Related IETF WGs ALTO Application Layer Traffic Optimization  See following slides. CCAMP (& MPLS) Common Control and Measurement Plane  Enabler of sub-IP network information and reservations. PCE Path Computation Element  Key concepts and approaches for dealing with optimization are useful. No direct overlap. PCN and other congestion related efforts We are concerned with much longer time scales and mechanisms below the IP layer. No direct overlap. March 2011 IETF 80, Prague Czech Republic

IETF 80, Prague Czech Republic ALTO WG Origins: IRTF Peer-to-Peer Research Group Tackling P2P traffic load and inefficiencies Charter goes beyond P2P, mentions CDN Similar concepts/definitions: Application, Network, Resources (content, processes), peer (includes client and server) Share network “topology” with application to enable “better than random peer selection” March 2011 IETF 80, Prague Czech Republic

Differences between proposed research & ALTO Sub-IP Layer Emphasis Overall goal is to leverage sub-IP layer agility (e.g. agile optical networks) Sub-IP excluded as a solution to P2P problem in RFC5693 Currently no sub-IP research groups at the IRTF Inter-Data Center and large aggregate flows Not intended to address P2P traffic issues. March 2011 IETF 80, Prague Czech Republic

Differences between proposed research & ALTO Application layer may make network reservation requests Currently no reservation notions in ALTO Combined Application & Network layer recovery techniques Not excluded from ALTO but more a research topic right now. March 2011 IETF 80, Prague Czech Republic

Similarity: ALTO Architecture Similar in structure to the application-to-network information sharing portion of this research proposal; No corresponding portion for application to network reservation/resource requests March 2011 IETF 80, Prague Czech Republic

Reuse: ALTO Protocol for info sharing For sub-IP networks much additional information would be required Basic structure could be reused once information requirements are developed as part of this research. March 2011 IETF 80, Prague Czech Republic