S O N i C - P r o g r a m m a b i l i t y, E x t e n s i b i l i t y a n d B e y o n d

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2 S O N i C - P r o g r a m m a b i l i t y, E x t e n s i b i l i t y a n d B e y o n d David A. Maltz Distinguished Engineer Microsoft Azure Networking

3 Application & Management tools SONiC [Software For Open Networking in the Cloud] Silicon/ASIC Switch SAI [Switch Abstraction Interface]

4 SONiC Recap Containerized Open Source NOS Platform Agnostic Velocity Reliability

5 What Is New - SONiC supports Open Optical Monitoring (OOM) Richer features, thanks to Alibaba: Vlan Trunk, TACACS, etc. and leading streaming telemetry work LinkedIn: leading FRR integration, BGP convergence and Open 19 Tencent: leading VRF work Mellanox: leading RDMA work Richer classes of devices Arista: modular chassis Marvell: ARM-based switch Richer scenarios via programmability SONiC Network Virtualization

6 New Challenges from Broad Spectrum of Workload management management software software software software

7 Case Study - VNET Peering in Legacy Network 1K VMs and 100 VNETs will Traditional Implementation require up to 10M routes!!! VNET represented by VRF VNET1 peering with VNET2 implies copy routes from VNET1 to VNET2 and vice versa 1K VMs and 100 VNETs will require up to 10M routes!!! K- VMs per VNET 0 VNETs Service A Service B Service C Port 1 ToR VRF 1 router VNET1 routers VNET2 routers Scalable Port 2 Port 3 VRF 2 router VNET2 routers VNET1 routers VNET3 routers VRF 3 router VNET3 routers VNET2 routers VNET 1 VNET 2 Peering Peering VMs 1.1 VMs 1.1 VMs 1.1 VMs 2.1 VNET 3 VMs 1.1 VMs 3.1

8 VNET Peering in Programmable Network SONiC Implementation 1K VMs and 100 VNETs need only Two match action tables Port to VNET Key: Port Action Set metadata Where metadata = VNET ID VNET routing Key: metadata, prefix Where metadata vector of VNET peers Action: next hop VNET1 peering with VNET2 -> turn on VNET1 VNET ID in VNET routing metadata of all routes originated by VNET2 A single route per VM VM update requires a single route update Service A Port 1 Service B Port 2 Service C Port 3 key port action 1 0x1 2 0x2 3 0x4 100k routes Set metadata VNET ID SONIC ToR Allowed VNET ID key Prefix action Next hop 0x VM.. 0x3 0x VM 0x7 0x VM.. 0x6 VNET 1 VNET 2 VNET 3 Peering Peering VMs VMs VMs

9 Parser port Flex1 Bridge Flex2 router flex3 tunnel deparser SAI Part: Programmable SAI API User programs NOS Application SandBox tunnel app Tunnel.p4 P4 SAI Compiler FLEX SAI host adapter Auto generated SAI objects SAI pipeline HW RO blocks flex M&A flex parser flex de-parser Multiple switching SW options, develop apps SAIFlexAPI uniform API for all programing language

10 SONIC Part: Supporting VNET SONiC Switch RestAPI: Provide RestAPI for external SONiC Stack Allow external control to config the switch RestAPI Server Quagga ARP Provides real-time data path counters and resource monitoring Use OpenAPI specification (swagger) SWSS Orchagent SWSS/Orchestration Agent SAI with tunnel extension Use SAI with tunnel extension API Provide tunnel support to upper applications ASIC

11 SONiC Part: Achieving Scalability via DPDK SONiC Switch SWSS/Orchestration agent: manage multiple SAI SONiC Stack instances Manage tunnel entry cache between DPDK and RestAPI Server Quagga ARP ASIC Server: data plane scalability and programmability 16M tunnels Linux Server SWSS 40G/100G line rate 25 ~ 30 us forwarding latency VXLAN Encap DPDK CPU Orchagent SAI DPDK SAI - ASIC ASIC ASIC: High port density and rich data plane functionality Tunnel entry cache Underlay routing Traffic policing/shaping ACL Mirroring

12 Demo: SONiC for Network Virtualization SONIC-BMToR VM VM BM1 Port 1 Port 4 VM Demo setup Port 2 Port 3

13 Demo: SONiC on Chassis Switch

14 Moving Forward: Enabling WAN Scenarios Global network is growing exponentially, requires Agility for fast Time to Market feature release and defect remediation To minimize hardware dependencies To scale and grow the WAN efficiently while controlling costs Sonic is an integral element of our cloud SDN solutions for intelligent traffic management Two major roles Edge Peering Router Backbone Router

15 More Demos in Microsoft (A11) and Partner Booths New ASIC Supported Pizza box and Chassis Rich Hardware Platform Supported Programmability Virtualization

16 Open Invitation OCP SONiC/SAI workshop on 3/22 Inviting contributions in all areas SONiC/SAI Hardware platform New features, applications and tools Download it, test it and use it! Website: Mailing list: Source code: Wiki:

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