DASH Workgroup Community Update 8/6/2025 and 8/13/2025

[Kristina Moore]

Hello DASH Community –thank you for your time over the last 2 weeks.  I am sending consolidated notes, apologies for the length!  

We continue to have a potential contribution back up for grabs.  It would be great to have a volunteer to suggest a PR in the dash-sonic-hld (in the SONiC repo here) for commands to show ENI counters and DPU global metrics – please submit a PR if you are interested!

 

In Summary, PR development turnaround is very busy; we Merged 19 PRs across multiple SONiC repos this week related to SmartSwitch HW, testing, and HA.  For full context please see entire write-up in the 'Full Notes' section below).  This week, for brevity’s sake, I’ll not include the ToDo items in the project board.

Follow-up tasks:

• Container Offloader PR Review: Share the PR related to the container offloader with Murali 
• SRC MAC Rewrite Status: Check with Soumya on the current status of the SRC MAC rewrite (Kristina)
• DPU Timeout Test Ownership: Check with Nishant to confirm whether the DPU timeout increase proposal is modifying the team's test or if further action is needed. (Ramesh, Murali)
• Tunnel Key Attribute PR Review: Ask Mukesh to review and add his comment to the PR regarding the tunnel key attribute. (Senthil)
• HA Test Review: Review the pending HA test contributions from the SONiC team and provide feedback.
• PR Review for Dream Big Semi Contribution: Assign a reviewer to the Dream Big Semi PR for the missing deparser emission update. (Kristina)
• HA Session Parameter Task Scheduling: Move the low priority HA session parameter, bounce back IP, and underlay TTL tasks to September and revisit after the first release. (Kristina)
• Max DPU Process Timeout PR Review: Follow up with Vasundar to review and approve the PR for increasing Max DPU process timeout from 360 to 400 seconds. (NVidia)
• PTF Test PR Presentation: Schedule TCS to present their PTF test PR for Sonic in the next week or two. (Kristina)
• VTAP Feature Documentation Presentation: Coordinate with Pranjal or Niraj to present the VTAP feature documentation in the next month. (Kristina)
  

In Summary (full list below), since the last Community call we have:

19 PRs Completed (-3)

9 in To Do (+/- 0)

4 in Draft (- 2)

36 in Progress (+7)

9 Awaiting Review (+/- 0)

Just a reminder that we would encourage/invite Community members to present to the Community (test runs or progress, new scenarios, etc…), just ‘r’ to let me know, or generate a PR in the repo.

The DASH YouTube channel link is here to subscribe / access WG content (and click the bell to receive notifications). 

Thank you for your time/contributions – see you on 8/20/2025

SONiC-DASH-Workgroup Community Meeting #156 & 157

Attendees (16):

DASH Group to join: https://groups.google.com/g/sonic-dash     

Linux Foundation list: https://lists.sonicfoundation.dev/g/SONiC-Dash

 

Abdul Rouff - Nvidia	Joel Moses - F5	Oleksandr Ivantsiv - Nvidia	Veerappan, Senthilnathan - AMD
Bud Grise - XSightLabs	Kristina Moore - MSFT	Prabhat Aravind - MSFT	Vivek Reddy Karri - Nvidia
Don Ewald - Cisco	Michal Zygmunt - MSFT	Ramesh Raghupathy - Cisco	Marian Pritsak - NVidia
Gagan Punathil Ellath - Nvidia	murali Venkateshaiah - Cisco	Swami Balasubramanian - Keysight	Philipp Keydel - Synogate

  

Full DASH Community Notes 😊  

• Discussion of Meeting Cadence and Potential Breaks: possibility of implementing a 'three weeks on, one week off' meeting schedule to provide the team with periodic breaks, referencing practices from other groups and seeking input on flexibility in scheduling.

•  

• Status Review of Ongoing and Pending Work Items:
• Metering Counter Support PRs 23466 MERGED
• Show System Health Output PR3834: Cisco discussed a health-related work item that is currently on hold pending input from Vasundhara and Prince.
• HA Set Key Attribute PR679: identified a PR for adding a tunnel key attribute and asked Mukesh to review it; Senthil clarified that Mukesh was not present and committed to asking him to add his comments, with Kristina agreeing to post the PR in the chat for visibility.
• Smart Switch Container Offloader HLD PR1976 Clarification: Murali inquired about the container offloader item, asking if it was related to ZMQ cache optimization. We clarified that it was a different task involving interaction with an offloaded container from NPU on the DPU side.
• SRC MAC Rewrite PRs: Checked with Soumya regarding the status of the source MAC rewrite; still in progress.
• NVIDIA PCIE Check and DPU Timeout: concerns the PCIE check command and another regarding increasing the Max DPU timeout, with Cisco discussing whether the timeout change affects their tests and agreeing to investigate further with Nishant.
• Recent Cisco Contributions: Recent PRs from Cisco, including updates to add VIP V4/V6 and HA Set ID to tables, noting these changes were intended to simplify agent design and had already been merged.
• PL NSG Tests Progress: Lawrence Lee from the SONiC team continues work on PLNSG tests.
• HA Test Contributions and Review: Multiple HA test-related PRs are pending review, a significant number of contributions from the SONiC team and Keysight
• Deparser contribution: Dream Big Semi provided a deparser emission update submitted by Fani under Farhat's supervision, which is awaiting reviewer assignment.
• ENI Counter Test Plan Merge: Jinbin submitted and merged an ENI counter test plan and test cases.
• Noisy Neighbor Issue and Fix: Fred from Cisco addressed a noisy neighbor issue caused by frequent DPU state updates and unfiltered ReDis notifications, implementing changes to suppress unnecessary notifications and reduce pollution.
• Platform Alignment for Smart Switch PRs: Prabhat raised a concern about platform graph alignment between SmartSwitch and non-SmartSwitch implementations in a PR authored by Ramesh, who acknowledged the need for changes and committed to updating the PR before merging
• Chassis ID Crash Fix: Judy Joseph from the SONiC team implemented a fix to prevent crashes within chassis ID on the SmartSwitch , addressing stability concerns in the reporting module.
• New Test Coverage for DASH Features: Lawrence Lee created new tests to cover DASH Trusted VNI, Floating NIC, and Return Path ECMP, with Prabhat noting ongoing work and no expected image changes..
• HA Table Programming and Standby Conversion: Cisco contributed updates to ensure DASH_HA_SCOPE_TABLE is programmed after DASH_HA_SET_TABLE and to convert unspecified entries to standby.
• Low Priority HA Session Parameters and Timeline Adjustments: consulted Nvidia regarding the prioritization of HA session parameters, bounce back IP, and underlay TTL. Recommended waiting until after the first release and revisit these items in September.
   
• Review and Visualization of GitHub Activity: demonstrated a Power BI dashboard for tracking GitHub activity across SONiC repositories, discussed her data filtering approach, and solicited feedback.
• Filter: on relevant keywords such as DASH, Smart Switch, and DPU.

•  

• Keysight and NVIDIA Collaboration Updates: discussed ongoing collaborations with Keysight and NVIDIA, including traffic testing through NPUs and DPUs.
• SigComm paper proposal: collaboration with Microsoft Research China re: DASH & SmartSwitch paper.

 

 

 

Sticky for Links/Reference:
DASH Groups to join to receive Invites, Meeting Notes, and Comms	DASH: https://groups.google.com/g/sonic-dash     DASH-Test-Workgroup Group: https://groups.google.com/g/sonic-dash-test-workgroup   Linux Foundation list: https://lists.sonicfoundation.dev/g/SONiC-Dash	If anyone knows potentially interested people who would like info re: our community, please have them joins these groups for receive Comms, etc…
Links to Recording	Teams/Sharepoint: Aug 6  SONiC-DASH Workgroup Community Meeting-20250806_090333-Meeting Recording.mp4 And Aug 13  SONiC-DASH Workgroup Community Meeting-20250813_090311-Meeting Recording.mp4   DASH Community YouTube: Aug 6  https://youtu.be/y05TLOlcH34 Aug 13  https://youtu.be/sRMwnPoti3k   HA moved to SmartSwitch LF group on Thursdays YouTube Behavioral Model: No agenda this week	8/06 & 8/13/2025 DASH Community Call; please request access via the link if you are not able to view/listen
Azure DASH GitHub Repo:	https://github.com/sonic-net/DASH
Test/Docs folder:	https://github.com/sonic-net/DASH/blob/main/test/docs/dash-test-workflow-saithrift.md	Ideal test workflow is here, converted to .md
SAI Thrift	SAI Thrift PR	Client server needed for testing
P4	https://opennetworking.org/p4/ and https://p4.org/working-groups/	Open source, domain-specific programming language for network devices, specifying packet processing for data plane devices (switches, routers, NICs, filters, etc.)
PINS	https://opennetworking.org/pins/
PNA consortium spec	https://p4.org/p4-spec/docs/PNA-v0.5.0.html	An architecture describing the structure and common capabilities of network interface controller (NIC) devices which process packets transiting one or more interfaces and a host system. Describes the structure and capabilities of the pipeline, and a user program, which specifies the functionality of the programmable blocks within that pipeline. For more information, see the P4 Language Consortium specifications
IPDK	Infrastructure Programmer Development Kit (ipdk.io) and https://github.com/ipdk-io/ipdk-io.github.io	IPDK is an open source, vendor agnostic framework of drivers and APIs for infrastructure offload and management which runs on a CPU, IPU, DPU or switch. IPDK runs in Linux and uses a set of well-established tools such as DPDK and P4 to enable network virtualization.
bmv2	https://github.com/p4lang/behavioral-model	The second version of the reference P4 software switch, nicknamed bmv2 (for behavioral model version 2). The software switch is written in C++11. It takes as input a JSON file generated from your P4 program by a P4 compiler and interprets it to implement the packet-processing behavior specified by that P4 program
DPDK	https://www.dpdk.org/	DPDK is the Data Plane Development Kit which consists of libraries to accelerate packet processing workloads running on a wide variety of CPU architectures.
Linux Foundation SmartSwitch	https://lists.sonicfoundation.dev/g/sonic-smartswitch/calendar

 

 

Thank you again for your participation…

Kristina Moore MBA, M.S., CISSP - Azure Core Principal PM / DASH & SmartSwitch
Office: 425-722-7720     Mobile: 425-876-2040     Email: kri...@microsoft.com
DASH Group to join: https://groups.google.com/g/sonic-dash    
Linux Foundation:  https://lists.sonicfoundation.dev/g/SONiC-Dash