1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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