2022-11-10 Network Engineering Team Meeting notes

NET Action Items Status

  Timelines & Milestones Review

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Baseline Milestones Spreadsheet Review and Checkup:

• LHN connectivity test requirement has been met with PerfSONAR end-to-end measurement tests.  This spreadsheet box should now be green.
• Network acceptance/verification tests are dependent on completion of migration from Cisco ACI on the Observatory LAN.  In parallel, the structure of the test plan is being worked on by Vera Rubin.
  • Current end-to-end evaluations are Base → Archive, but objective of verification testing is Summit → Archive
  • Current 100GE LHN path still has shared 100GE Jax/Atlanta segment; due to be replaced in March 2023.
  • Permanent US-DF is still under construction, but is receiving LHN data in its interim location, which can support verification testing.
  • Data Management (DM) drives the LHN verification requirements, but verification tests won't necessarily push up into DM levels.

LHN PerfSONAR data:  

• Briefly discussed the La Serena ↔ SLAC PerfSONAR (PS) measurement data for the past month to capture how the LHN path is working.  The PS data was very nominal:
  • https://dashboard.ampath.net/maddash-webui/details.cgi?uri=/maddash/grids/RubinObs-LS:+RubinObs+LHN+-+Latency:+La+Serena+-+SLAC+-+Loss/139.229.140.135/134.79.235.226/Packet+Loss
  • Discussed whether this type of cursory review of the LHN PS data for the previous month should be an ongoing activity.  Consensus was this seemed like a good idea, but no permanent decision was made.

Documents - Google Drive

• Vera Rubin Observatory:
  • ACI migration preparations continue. 
  • AuxTel data run in the end of October and beginning of November has used the LHN path.  While data levels have been modest, transfers have gone smoothly.
  • Some flapping noted on La Serena ↔ Santiago LHN primary path.  Reported on Slack channel.
• REUNA:
  • LHN La Serena ↔ Santiago primary path has been minimally-used as of late due to service provider fiber cuts.   LHN traffic has been transparently carried on the secondary path during these outages. 
• AmLight:
  • The new Buenos Aires ↔ Sao Paulo segment is still being worked on.

Rubin Observatory Networks, SLAs for Operations:

• AmLight LHN SLA has a signed contract.  REUNA LHN SLA is being worked on; not signed yet.

Virtual NOC: 

Document update status summary: 

• No significant progress on updates, including Network Operations & Management document.

Misc:

The LHC community is conducting a series of WAN data movement challenges, preparing for the start of their High-Luminosity LHC era in ~2029.  The next challenge will be in early 2024.  They are attempting to organize network monitoring capabilities to measure the impact of these data challenges on the R&E WAN infrastructure and are looking to see if other large-scale science collaborations would like to be involved.  From a NET perspective, it may be interesting/useful to see what network monitoring tools/services are involved.  At a higher level, the LSST collaboration may or may not want to be involved.  Phil D. will pass this information up to Richard DuBois.