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(Default schedule is second Thursday of Month.)

0800 PT/0900 MT/1000 CT/1100 ET/1200 CLT

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Meeting ID: 602 918 755

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Meeting ID: 602 918 755
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Meeting ID: 602 918 755

Meeting Recording:





  • Coordination of networking activities across LSST

Discussion items






NET Action Items Status

Reminder: Work on your action items: International Communications (aka Long-Haul Networks)

Documentation updates schedule:

August - LSST Joint NSF/DOE Status Review will establish new overall project schedule, commissioning milestones.  Observing with ComCam pushed back and shortened, observing with FullCam pushed back. We updated Network Milestones sheet accordingly. COMPLETE (See attachment)

September - Created FY20 contract amendments for FIU, REUNA, NCSA. COMPLETE

October - Complete LSST Change Request to update LSE-309 Summit - Base ITC Design Document (including Summit and Base networks) and related milestones in PMCS. COMPLETE

November/December - (Holidays and other activities.)

January - Continue work on  LSST Network Verification Plan (including JIRA).  Develop draft LSST Operations Network SLAs.  See discussion below. 

February - Prepare for LSST Networks Review. Submit LSST Change Request to update LSE-78 LSST Observatory Network Design (including Chilean, International, and US networks) and related milestones in PMCS.  Including updated diagrams, including ESnet, etc. Complete work on  LSST Network Verification Plan (including JIRA).  See discussion below.

Update on CONUS Networks

CONUS Networks, including ESnet:

What is expected start date for working on Phase 2 (2 x 100 Gbps ATL - CHI)?(See Email thread)

Chilean/International Networks Update

Developments in La Serena and end-to-end service to NCSA for upcoming Auxiliary Telescope Traffic and general (internet, mail, voice) traffic:

ATS instrument and servers have arrived in Chile, installation starting soon, for expected on-sky in February.

Brought old perfSonar node back to La Serena, two new ones have not been received, one will go on summit, other in base but not clear if on LSST side or AURA side.

At AmLight PoP in Santiago, upgraded to 100G boards, activated 100G DTN, activated perfSonar node, have taps.  At NCSA have 100G node in place.

La Serena - Santiago tried upgrade, but new DWDM 100G card had problems, working with Infinera to debug.  Hope to have by early next week.  (Jeronimo Bezerra  this is typical of 10G to 100G migrations).  No evidence so far that the card has design flaws.  GEANT uses Coriant boxes and cards, multiple 100G.  NEW ACTION ITEM

Will start to test resilience as soon as LS - SCL is ready.  Have multiple paths LS - NCSA.  Need  to define how to provide Verification and Validation and regular automated testing and fail-overs. (See V&V discussion as well).

NCSA - CC-IN2Pe Networks updateMatt Kollross

NCSA - CC- IN2P3 network:

Richard Hughes-Jones (GEANT) works on high-performance networks, working on SKA networks.  NEW ACTION ITEM

Other Discussion Topics

By topic

LSST Network Document Update:  Julio IbarraJeff Kantor

Received input from people, but need to incorporate.

LSST Network Verification: Jeff Kantor

LSST Networks needs to be formally verified as ready for LSST System Integration and Commissioning.  2019-07-11 Meeting published a list of requirement to be verified and a diagram of the JIRA test artifacts that must be done. (NOTE: Confluence can't render the JIRA test artifacts attachment, but it is a valid JPG file.  Download it to view it.)  Also see Network Verification Plan and Matrix, recently updated, on LSST-NET home page.

Management wants a network verification readiness review sometime in February - March, need to discuss timing and scope.

LSST Network SLAs for Operations: Jeff Kantor

FIU flow-down SLAs provided, will use as template for others.

LSST doing due diligence on networks for various operations models with DOE paying 50% and NSF paying 50%.

Virtual NOC: Jeronimo BezerraRon LambertAlbert AstudilloMatt Kollross Vincenzo Capone

(See 20191022 NET Meeting and email thread on NET mailing list)

Jeff Kantor , Julio Ibarra , Phil DeMar - Met with Ed Moynihan, Cory Donovan of Global NOC to discuss requirements and possible involvement.  We need to fill out initial network assessment questionnaire.

Network Security:

The US Federal government is asking us to respond to securing networks against exploiting LSST images to find satellites.  The project has drafted a response (DMTN-108) and some of us have provided comments.  A question: we suggested monitoring attenuation, what would it take to do that?  Jeronimo BezerraCan monitor in transceivers if we own infrastructure, not possible in all links. Only comprehensive solution is to encrypt data.  Could be done at Layer 2 or Layer 3 or application (e.g. TLS) (or combination).   NEW ACTION ITEM

Network Design and End-to-End Test Plan and QoS planningNeed to finish 100G migration in Chile to resume work on this.

Other businessAny

Wrap up and next meeting

Wrap up and Next meetings:




All meetings at 0800 PT/0900 MT/1000 CT/1100 ET/1200 CLT (subject to time changes)

Action items 

  •  Albert AstudilloSend network configuration to Stuart McLellan, Richard Hughes-Jones for comparison/debugging Coriant/Infinera 100G issue  
  •  Richard Hughes-Jones read LSE-78, schedule meeting with Matt Kollross, Stuart McLellan to get up to speed on NCSA - CC-IN2P3 plan  
  •  Julio IbarraAssign sections of GlobalNOC questionnaire to NET members and fill in any that can  
  •  Jeronimo Bezerra Send options for attenuation monitoring, encryption at Layer 2, 3 to Jeff Kantor for DMTN-108  
  •  Jeff KantorJulio Ibarra Prepare agenda, requests for information for April 2020 SAAAC and NET meetings.  SAACC and NET meeting invitations and meeting page link sent out, all should reply on attendance, register.  Draft agenda is on meeting page.