SONiC-DASH Workgroup Meeting Minutes 4/6/2022

[Kristina Moore]

Hello DASH Community – thanks for your time on Wednesday.  

I am coordinating (last week and this), to upload our SONiC DASH Community Meeting recordings to match the larger SONiC team recordings location.  Once finished, they will be linked from https://www.opencompute.org/wiki/Networking/SONiC to YouTube.  This is in process now to upload the remainder of the meetings.   

 

 

We will be establishing a High Availability Working Group, and will follow up with the Behavioral Model call(s) scheduling as well (see below).

 

The notes from last Wednesday are below, along with the recording link.  See you on 4/13/2022.   

Meeting Title:  SONiC-DASH-Workgroup Community Meeting #18

April 6, 2022

Attendees (34):

 

Agrawal, Ashutosh - Intel	Guohan Lu - MSFT	Mahalinga, Venkatesan - Dell	Mohammad Hanif - Broadcom	Sanders, Mark - Dell
Alberto Villarreal - Keysight	Jai Kumar	Marangwanda, Shingi - Intel	Niranjan - Broadcom	Sudarshan, Reshma - Intel
Baldi  Mario - Pensando	James Grantham - MSFT	Marian Pritsak - Nvidia	Oleksandr Ivantsiv - Nvidia	Venkat Pullela - Keysight
Bud Grise - XSightLabs	james_lo 駱正雄 - Accton	Matty Kadosh - Nvidia	Pourya Shahmaleki - MSFT	Vinod Kumar - Keysight
Ezra Yosef - XSightLabs	John C Carney - XSightLabs	McCollum, Macy - Intel	Prince Sunny - MSFT	Vivek Reddy Karri - Nvidia
Fingerhut, John Andy - Intel	Kristina Moore - MSFT	Michal Zygmunt - MSFT	Rama	Volodymyr Mytnyk - PLVision
Gerald Degrace - MSFT	Lisa Nguyen - Broadcom	Mircea Dan Gheorghe - Keysight	Sandeep Balani - Broadcom

 

Discussion
 

SmartSwitch RFI has been issued

We have our ideas, we would like to have your input prior to RFQ

 

Metering document

ETA in 2 weeks or so

 

DASH APIs NB Facing

We have a draft schema .json file - Kristina and @michael miele to publish soon

Prince is converting to tables and SONiC YANG (language used to interact) beginning tomorrow 4/7/2022

Hanif - reference implementation from the POV of the Control Plane; it mimics Bluebird/DASH/SDN agent to SAI

 

Routing Document

Michal described scenarios witing the draft Routing Document

Our customer has full control of the route table

Inside the VNET, traffic uses a 2nd level lookup using the mapping table

Community participants please read through and comment

SMARTNic needs the functionality of SDN to route the traffic

SmartSwitch is a form factor, but the functionality s/be the same

 

.JSON (kind of how Azure 'works') - we can publish, however it is a living document and will likely change

VPC=VNET (terminology), unification of the names Prince will ensure naming aligns

We've updated to 5 ACL stages in the SDN Transforms document on GitHub (a few weeks ago, just a reminder)

SNAT policy and Metering are out of scope for now

VPC-Mappings

IPv6 must be supported in Underlay and Overlay (needed for big customers where Azure is an extension of their On-Prem, their VMs do not have to have Internet connectivity.  Virtual network uses IPv6 and they want to use their own addressing).  For example if they come in over Express Route. 

There is a maximum 16 'routing-actions' (see .json file where have 8 or so identified)

Prior to this project, SDN hasn't been working with hardware, it's been VFP (which is very flexible)

 

New Status Fields in BM Project

Request for a 'Scoping' Status field in the behavioral model GitHub project - done

 

Behavioral Model, Simulator Update: 

Added a few items to model per Hanif

Community would like to have a Weekly behavioral model meeting; Kristina to schedule
 

Sample view below w/volunteers needed for 'Backlog Needs Owner' items:

 

 

 

 

	Upcoming Action Items for Apr 6th, 2022	Status/Date	Notes
1	Smaller High Availability Working Group to be led by Nvidia * Kristina to create HA Working Group * Schedule HA weekly call	To be scheduled	Kristina & NVidia to schedule
2	Draft schema .json file upload to GitHub Repo	Apr 12th	Kristina and Michael to publish
3	Behavioral Model volunteers needed	Many items have volunteers, just a few left	See Behavioral Model Figure above Skills needed: ability to dig into the P4 compiler, software switch, and software simulation tool  Andy hosts P4 tool sessions - please see email in SONiC-DASH email group
4	Michal Zygmunt to present NB interface	TBD
5	Nvidia behavioral model update (to publish their code added to bmv2 for the DASH model) Goal:  Modify at-will P4 defined Behavioral Model (i.e. change the code), and auto-gen APIs.  The 'implementation' does not have to be P4.   Everything s/be part of the P4 model, and to be emulated https://github.com/marian-pritsak/DASH-1/tree/toolchain/sirius-pipeline	Jan 26th Feb 9th Mar 2nd Mar 30th	NVidia has finished the reference implementation of SAI APIs into P4 runtime, it's been working this week.  Need to generalize into a template.  The last step will be to become auto-generated.  Need ~ 3 weeks to do so.  This iteration includes match-action, routing and ACLs.
6	Intel - SAI Thrift (API) PTF and extension to SmartNic (to work with any SAI device)	Resource procured, design work aligned, coding started.  May have demo by Spring.	Discussed in 3/30/2022 Community Meeting; as the project moves forward, we can review changes in the Community Meeting first, and next move into the Tuesday SONiC meeting for review in that forum.  Underlay features (critical), and incrementally add cases to move to SmartNic.    The test cases have many dependencies and are geared toward testing a switch (a SmartNic - has different requirements vs. a switch, ex: port expectations are different), and some code changes will be required.
7	Community please Review PRs and comment	PRs filed for review/comment	https://github.com/Azure/DASH/pulls
8	Issues list for tracking & resolution

 

Sticky for Links/Data:
Link to Recording	SONiC-DASH Workgroup Community Meeting-20220406_091803-Meeting Recording.mp4	4/06/2022 Community Call; please request access via the link if you are not able to view/listen
Azure DASH GitHub Repo:	https://github.com/Azure/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 Principal PM, Azure Core – DASH Phone 425-722-7720  Cell 425-876-2040 Email kri...@microsoft.com One Microsoft Way  Redmond, WA 98052