EJFAT Group Meeting Jan. 20, 2022

The meeting time is 11:00am.

Connection Info:

You can connect using ZoomGov Video conferencing (ID: 161 012 5238). (Click "Expand" to the right for details -->):

Meeting URL
 https://jlab-org.zoomgov.com/j/1610125238?pwd=QnEvcjV6VFFndWZsQW15SmJKU0RJZz09&from=addon

Meeting ID
161 012 5238

Passcode
503371

Want to dial in from a phone?

Dial one of the following numbers:
US: +1 669 254 5252 or +1 646 828 7666 or +1 551 285 1373 or +1 669 216 1590 or 833 568 8864 (Toll Free)

Enter the meeting ID and passcode followed by #

Connecting from a room system?
Dial: bjn.vc or 199.48.152.152 and enter your meeting ID & passcode

Agenda:

1. Previous meeting

2. Issues for Discussion:
   • Status of P4 code update for packet checksum (ESnet)
   • Status of new bit-file for UDP-LB U280 FPGA (ESnet)
   • Status of S/W support stack for LB Host Control Plane (ESnet)
   • Differences in OS Networking behaviors
   • UDP AutoFragmentation
   • Status of Edge to Core Test Design
     • ERSAP / CLARA Data Generation for UDP-LB (Vardan)
     • UDP-LB Meta Data Insertion / Packetizer (Carl)
     • UDP-LB Emulator (Mike)
     • UDP-Reassembly (Carl)
     • Test Plans / Goals (Mike)
   • Configuration of network switches and Host CPU for FPGA LB (Bryan)
   • Status of PO for Edge to Core Test Equipment (Amitoj)
   • Status of PO for Network Equipment (Brent)

3. AOT

---

Minutes:

• New U280 bitfile built and currently in test
• Control Plane helper API still in development
• Must engineer complete data path from source/sink for full path MTU
  • Safe choice < 1500 B
  • Should engineer network for 9kB
  • Layer-2 switches do not induce fragmentation
  • IP headers can be designated as Do not fragment (We may want to impose this on Data Sources)
  • ICMP msg feedback can indicate that device would have fragmented (but can't)
  • tracepath tool can report path MTU
  • LB host should send gratuitous arp msgs
  • VLAN for 2 x 100Gbs switch ports for U280
• Compute Server PO: awaiting pricing for bundles/unbundled configurations
• Network PO - submitted
• Action - Amotoj - enhance EJFAT wiki page with engineering details for
  • setting up 9kB MTU
  • settings for Linux kernel
• Action - Bryan - engineering details for initialization of switches, hosts, FPGA for coordinated network address discovery, etc.

Attendees:

• M. S. Goodrich
• D. Lawrence
• G. Heyes
• Y. Kumar(ESnet)
• S. Sheldon (ESnet)
• C. Timmer
• V. Gyurjyan
• D. Abbott
• B. Hess
• A. Singh
• B. Morris