2. KISTI Daejeon, 23rd September 2015
LHCONE in Asia
Alice Forum
KISTI Daejeon, 23rd September 2015
CERN IT Department
CH-1211 Genève 23
Switzerland

3. Activities and status

4. ALICE Tier1/2 workshop Tsukuba
March 2014 in Tsukuba, Japan
Hosted by University of Tsukuba

5. Workshop at APAN 38th Nantou
August 2014 in Nantou, Taiwan
Hosted by ASGC

6. Asia Tier Center network forum
September 2015 in Daejeon, South Korea
Hosted by KISTI

7. Asian LHCONE concept from APAN 38th

8. Currently connected Asian countries
Japan
Taiwan
ASGC
India
=> WLCG traffic among these countries worse than ever

9. Challenges for the Asian LHCONE

10. LHCONE L3VPN architecture
- TierX sites connected to National-VRFs or Continental-VRFs
- National-VRFs interconnected via Continental-VRFs
- Continental-VRFs interconnected by trans-continental/trans-oceanic links
Acronyms: VRF = Virtual Routing Forwarding (virtual routing instance)
TierXs
TierXs
TierXs
TierXs
TierXs
National
VRFs
National
VRFs
National
VRFs
National
VRFs
Continental
VRFs
Continental
VRFs
Continental
VRFs
Continental
VRFs
LHCONE

11. Challenge: low delay (RTT)
Traffic between Asian countries must be routed within Asia (avoid transit to another continent or around the world)
Solutions: country networks get connected through
- one Asian continental VRF, or
- several well interconnected Asian VRFs

12. European example (one VRF)
All the national VRFs are interconnected by the Geant VRF:
European traffic stays in Europe

13. North America example (multiple VRFs)
North American Sites connect to Canarie or Esnet or Internet2.
Canarie, ESnet and Internet2 peer in multiple locations to guarantee optimal delay

14. Challenge: full connectivity
Guarantee reachability to all LHCONE sites
Solutions:
- continental VRFs full mesh peerings
- transit through another continental VRF (not the case today, subject of the next LHCONE meeting)

15. Problem example X
KISTI
CNAF
BNL
Korea
Italy
Continental
VRFs
TEIN
Geant
ESnet
If Geant doesn't give transit, KISTI and BNL cannot talk

16. Solution 1: full mesh TEIN peers with Geant AND ESnet KISTI CNAF BNL
Korea
Italy
Continental
VRFs
TEIN
Geant
ESnet
TEIN peers with Geant AND ESnet

17. Solution 2: transit VRF
KISTI
CNAF
BNL
Korea
Italy
Continental
VRFs
TEIN
Geant
ESnet
Geant gives transit to TEIN and Esnet => BNL and KISTI can talk

18. Challenge: use of transcontinental links
Several countries have already transcontinental links for WLCG (India, Japan, Korea, Taiwan..). How to use all of them?
Solution:
- national VRFs interconnected by continental VRFs with mutual transit

19. Solution example BNL ASGC Hiroshima Kisti CNAF Taiwan Japan Korea
Italy
ESnet
Internet2
TEIN
Geant

20. Asian traffic stays in Asia
BNL
ASGC
Hiroshima
Kisti
CNAF
Taiwan
Japan
Korea
Italy
ESnet
Internet2
TEIN
Geant

21. Mutual transit can save costs
BNL
ASGC
Hiroshima
Kisti
CNAF
Taiwan
Japan
Korea
Italy
ESnet
Internet2
TEIN
Geant

22. Next steps

23. Actions (proposal) - Agree on the architecture
- Agree on the policies (transit)
- Agree on shared resources
- Define national and continental VRFs
- Interconnect
- Enjoy

24. Next LHCONE meetings 28-29 October 2015, Amsterdam NL
13-18 March 2016, Taipei TW
(exact days to be defined)

25. Questions? Comments?