WhiteboxSolutionswithOpenSource:ONF-Stratum

Name: David Fermor Tiffany Chiang Krishna Kolakaluri

Date: Dec 4th 2018

DNINETWORKINGROADMAP

ODM

Disaggregated

SDN

Open Solutions

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PLATFORMMANAGERARCHITECTURE

BriefintroductiononthePlatformmanagerarchitectureforStratum

TiffanyChiangKrishnaKolakaluri

SwitchAgentArchitecturalComponents

Remote or Local Controller(s)

P4 Runtime gNMI gNOI

Switch Broker Interface

TableManager

Node/ChipManager

ChassisManager

ChipAbstractionManagersE.g.ACL,L2,L3,PacketI/O,

Tunnel

PlatformManager

SwitchSDK PlatformAPI

SwitchChipDrivers PlatformDrivers

SwitchChips Peripherals

Stratumsw

itchagen

t

user

kernel

hardware

Shared(HWagnostic)ChipSpecificPlatformSpecificChipandPlatformSpecific

PlatformManager(Phal)

•  ManagesplatformperipheralssuchasSFP’s,Fans,TemperatureSensors,Powersupplies,etc.o  Phal:AbstractclasswhichdefinesaninterfaceforPlatformHardware

AbstractionLayer(PHAL)o  LeverageOpenNetworkLinuxPlatform(ONLP)APIstoimplement

platformfunctionalities•  CodeContributors:Google(initialcodecontribution),Delta,Inventec,and

ONF

Reference:https://github.com/opennetworkinglab/stratum/blob/master/stratum/docs/phal.md

PhalFunctions

PhalComponents

ConfigMonitoringService

Kernel(ONL)

MiscHW

VendorXSwitchInterface

SwitchChip

StratumSwitchAgent

ONLP

ONLPAPIs

gNMIAPIs

ChassisManager

PlatformManager

OnlPhal

ONLPConfigurator

PhalDB

Adapter

ONLPAPIWrapper

SFPDataSource FanDataSource LEDDataSource…

EventHandler

- Phal interface function implementation

-  Provides event notifications of ONLP device changes

-  Handles only SFP present status today

-  Each data source manages one or more system hardware attributes.

-  Responsible for providing system and hardware information

-  Implements the ONLP API calls

PhalComponents

ConfigMonitoringService

Kernel(ONL)

MiscHW

VendorXSwitchInterface

SwitchChip

StratumSwitchAgent

ONLP

ONLPAPIs

gNMIAPIs

ChassisManager

PlatformManager

OnlPhal

ONLPConfigurator

PhalDB

Adapter

ONLPAPIWrapper

SFPDataSource FanDataSource LEDDataSource…

EventHandler

- A database describing the attributes of the System/HW

-  Defines the outward facing interfaces to the Phal DB

-  A class that inspects the system, creates the Data Sources/Attributes within the Phal DB.

PhalEventNotificationExample1. OnlPhalinitializesOnlpEventHandlerandregisters

eventcallback.2. ChassisManagersubscribesSFPeventsbycalling

RegisterTransceiverEventWriter()function.3. OnlpEventHandlerperiodicallypollsSFPpresence

statusfromONLPthroughONLP API Wrapper.4. OnlpEventHandlerdetectsanewSFPwasjustplugged

in.5. OnlpEventHandlerinvokesthecallbackfunction

providedbyOnlPhal.6. OnlPhalnotifieseventsubscribersbywritingtheeventto

theeventchannel.7. ChassisManagerhandlestheeventandretrievesSFP

detailinformationbycallingGetFrontPanelPortInfo()function.

ConfigMonitoringService

HW (SFP)

VendorXSwitchInterface

OnlPhal

ONLP

ONLP API Wrapper

ChassisManager

OnlpEventHandler

SFPDataSource

Subscribe SFP Event

Initialize and

register callback

Poll SFP

status

Invoke the

callback

Publish event

SFP Plugged

in

Retrieve SFP Info

CODESTATUSANDCONTRIBUTIONSPhalInterface RegisterTransceiverEvent, UnregisterTransceiverEvent GetFrontPanelPortInfo, Phal initialization Implement remaining functions OnlPhal

EventHandler

DataSource

PhalDB

Adapter

ONLP Configurator

ONLP API Wrapper

EventHandler SFP Event Polling and Notification Other event notifications

SFP Data Source

SFP Data Source FAN, LED, PSU, Thermal, etc. Data Sources

Attribute DB and Attributes Add any missing features

Wrapper Class GetSfpBitmap, GetSfpInfo, GetOidInfo, etc. Implement remaining ONLP APIs

Google Code Base Current Implementation Future

OpportunityforCommunityContribution

•  ImplementDataSourcestoaccessotherONLPdevices:fan,PSU,LED,andthermalsensor

•  CompletePhalDB:theAttributeDatabase•  ImplementAdapter•  ImplementONLPConfigurator•  ImplementremainingAPIsinONLPAPIWrapper•  EnhanceBuildprocess:buildingStratumimagewithONLPlibraryfor

variousplatforms

CodeContributions

WHITEBOXINTEGRATIONOurexperienceonintegratingStratumtoDeltaplatforms

StratumonWhiteboxSwitches

StratumintegrationoverviewwithDeltaWhiteboxswitchAG9064v1:1.  DevelopedsupportforAG9064v1inONLPv2.2.  InstalledONLandbuilttheBarefootSDEandinstalledontheplatform.3.  BuiltStratumbinarywithBarefootintegratedcode.4.  TestedStratumwithONOScontrollerinafabrictopologyusingfabric.p4.

StratumDemo

Pleasecometoourboothtoseethelivedemo!

Q&A

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