DASH Workgroup Meeting Minutes 8/16 and 8/23/2023

[Kristina Moore]

Hello DASH Community –thank you for contributing your time this month. 

In summary, this week we have a reminder that the High Availability high level design / initial proposal documents are published for consumption/review if you would like to take a look.  Please reach out to @Riff Jiang via lists.sonicfoundation.dev with any feedback or questions:

• PR: https://github.com/sonic-net/SONiC/pull/1445
• Doc: https://github.com/r12f/SONiC/blob/user/r12f/ha/doc/smart-switch/high-availability/smart-switch-ha-hld.md
• Slides: https://github.com/r12f/SONiC/blob/user/r12f/ha/doc/smart-switch/high-availability/smart-switch-ha-overview-slides.pdf

We merged PR404 to have a starting point for underlay routing, and also performed a follow-up for PR360 (SAI attributes for ACL rules should include list of IP prefixes for the Bmv2 compile); the potential solution here may be complex.  Detailed PRs and weekly meeting notes follow below…

As always, with respect to any of our DASH meetings High Availability (Tuesdays), Community (Wednesdays), or Behavioral Model (Thursdays) – please let me know if there are PRs, Q&A, or items you would like to discuss or present. 

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

See you on 8/30/2023

Meeting Title:  SONiC-DASH-Workgroup Community Meeting #80 & 81

Attendees (35):

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

DASH-Test-Workgroup Group to join: https://groups.google.com/g/sonic-dash-test-workgroup

 

Agrawal, Ashutosh - Intel	Jeevan - Arista	Mircea Dan Gheorghe - Keysight	Narayanan, Swaminathan - AMD	Sunil Kumar C Suvarneshwar - Arista
Amith GSPN - at large	Kamil Cudnik - MSFT	Muhammad Naveed Mozaffar - Arista	Oleksandr Ivantsiv - NVidia	Thyamagundalu, Sanjay - AMD
Andriy Kokhan - PLVision	Kristina Moore - MSFT	Mukesh MV - AMD	Riff Jiang - MSFT	Urvish - Arista
Bud Grise - XSightLabs	Kumaresh Perumal - MSFT	murali Venkateshaiah - Cisco	Rob Murphy - Cisco	Veerappan, Senthilnathan - MSFT
Chris Sommers - Keysight	Marian Pritsak - NVidia	mxiao - Arista	Saad Mazhar - DreamBig Semi	Vijay Srinivasan - AMD
Fingerhut, John Andy - Intel	McCollum, Macy - Intel	Narasimha Rao Vadrevu - NapaTech	Srinivasan, Vijay - AMD	Vincent Legrand - XSightLabs
Harris, David M - Intel	Megha Sinha - Arista	Mohammad Hanif - Broadcom	Sudharsan Dhamal Gopalarathnam - NVidia	Yakiv Huryk - NVidia

 

Discussion - PRs/Issues/Documentation for review, comments, suggestions

 

DASH Community Upcoming Project Action Items

 

 

 

 

Discuss:

ACL rule API is not generating the correct output (via P4code)

PR360 - SAI attributes for ACL rules should include list of IP prefixes for the Bmv2 compile  (follow up)

 

Discussed again in 8/16/2023 Community meeting

@Pterosaur had created a PR/fix?

1.      The current P4 code has a mismatch between the BMv2 and the SAI generation. To SAI, it’s list of prefixes, But to BMv2, it’s just a single prefix. This reason of difference is due to the limitation of BMv2 that cannot support the list of prefix as the key.

2.      We agree with using DASH_MATCH in dash_acl.p4 as default, to avoid the need to declare DASH_MATCH in other supplier pipelines.

3.                  Here are two solutions to achieve our goal:

1.      To set DASH_MATCH as default, but to remove this MACRO in BMv2 pipeline. This solution is simple enough, but isn’t perfect due to the gap between BMv2 and SAI (existing).

2.      And another solution, (possibly better) comes from @lguohan . We should keep the same declaration of list prefixes in P4 code. Although BMv2 doesn’t support list prefixes, we can expand the list of prefixes in saiapi level and input the single prefix to BMv2 one by one. This solution will be a little bit complicated but more reasonable.

 

 Other Notes:
 

Introduction/Welcome: 

None this week 

Next Week:

Cover (high level) HA slides in SmartSwitch SONiC repo

Other, please contact Kristina

 

                  

Sticky for Links/Data:
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	If anyone knows other people who would like info re: our community, please have them joins these groups for receive Comms, etc…
Links to Recording	Teams/Sharepoint: SONiC-DASH Workgroup Community Meeting-20230816_090340-Meeting Recording.mp4   SONiC-DASH Workgroup Community Meeting Aug 23 2023.mp4   YouTube: Wed Aug 16 2023 https://youtu.be/mdKESULkYUM   Wed Aug 23 2023 https://youtu.be/tc63wmTLGKQ HA Calls suspended Thursday Aug 24 Behavioral Model Call https://youtu.be/N47hlAmwh9Y	8/16/2023  and 8/23/2023 Community Call(s); 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/Azure/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.

     

 

Thank you again for your participation…

Kristina Moore MBA, M.S., CISSP - Azure Core Principal PM / DASH
Office: 425-722-7720     Mobile: 425-876-2040     Email: kri...@microsoft.com
DASH Group to join: https://groups.google.com/g/sonic-dash    
DASH-Test-Workgroup Group to join: https://groups.google.com/g/sonic-dash-test-workgroup