Enabling Rapid Innovation in the Network Using SONiC and P4. Ramkumar Krishnamoorthy (Barefoot) Guohan Lu, Lihua Yuan (Microsoft)

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1 Enabling Rapid Innovation in the Network Using SONiC and P4 Ramkumar Krishnamoorthy (Barefoot) Guohan Lu, Lihua Yuan (Microsoft)

2 Agenda SONiC SONiC-P4-SWITCH SONiC-P4-SWITCH for Azure

3 SONiC and the Open Switch Stack Software Networking Components SONiC Switch State Service Open Network Linux SAI OCP Hardware ONIE Hardware Components Packet Forwarding Chip (ASIC)

4 What is SONiC Software for Open Networking in the Cloud A collection of software components/tools Builds on the foundations of SAI Provides L2/L3 functionalities targeted for the cloud Linux-based switch operating system, looks and feels like Linux Community driven, open source effort Shared on GitHub, Apache License Believe in working code + quick iteration

5 SONiC High Level Architecture Linux Network Applications Object Library Switch State Service Kernel User Space Object Library PAS SDI PAL - sysfs HW Peripheral drivers netdev Network device drivers SAI ASIC SDK ASIC PCI driver Various OCP Chassis Supplier ASIC Supplier Fan/Power/LED Switch Hardware Transceiver ASIC Linux

6 Switch State Service (SSS) Network Applications Orchestration Agent APP DB SAI DB SyncD Object Library w/ Redis Backend SAI DB: persist SAI objects APP DB: persist App objects DB backend: redis with object library SyncD: sync SAI objects between software and hardware Orchestration Agent: translation between apps and SAI objects, resolution of dependency and conflict SAI Key Goal: Evolve components independently ASIC

7 How Routing Works in SONiC BGP Neighbor BGPd Zebra fpmsyncd APP DB Orchestration Agent socket SAI Redis SAI DB Host Intf netdev SyncD ASIC SAI Route

8 How LAG Works in SONiC LACP Neighbor teamd teamsyncd APP DB Orchestration Agent teamd netdev socket Host Intf netdev SAI Redis SAI DB SyncD ASIC SAI lag

9 Benefits of P4 Switch Programmable Pipeline Add new feature, tweak / improve / fix existing features Rapid Prototyping and Testing Pipeline changes can be compiled and tested in just a few hours!! Feature-rich P4 defined pipeline switch.p4 provides fully functional advanced L2/L3 switch pipeline Zero Effort Silicon Migration The pipeline can run on simulator and P4 devices

10 SONiC and P4 SONiC SAI Emulation Namespace (emulns) JSON representatio n for P4 target P4 Switch Simulator

11 SONIC P4 Switch in Azure VM LEAF 1 LEAF 2 TOR 1 TOR 2 HOST 1 HOST 2 Build SONiC + P4 into a container Deploy container in Azure VM Connect containers via Mininet Build, test and deploy cloud network in Azure within minutes Test SONiC control plane stack without real hardware SONIC-P4-SWITCH VM

12 SONIC P4 Switch for Azure Network 24 regions around worldwide Hundreds of thousands of switches to manage Complex suites of network management software stack Continuous switch configuration/software rollout Real-time network failures handling Large challenge to test the network management stack Emulating Large scale network in the cloud Test configuration rollout and software deployment Test various failure scenarios (Link/Switch/Podset)

13 Use scenario 1: Switch Configuration Validation Network Graph Service Device Configuration Generation Service Configuration Push Service

14 Use scenario 2: Network Failure Emulation Network State Repair Service Network State Service Network State Monitor

15 Build and Deploy in Azure Github P4 SONiC Build Server Mininet script Azure VM SONiC-P4-SWITCH Docker Registry

16 Takeaway SONiC is full open source L2/L3 switch stack from Microsoft SONiC + P4 switch simulator turns into a high fidelity switch emulation platform Build, deploy and test SONIC-P4 Switch in Azure VM in minutes

17 Q & A