DESIGN OF BARE METAL FABRICS

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1 DESIGN OF BARE METAL FABRICS Built with SDN, Bare Metal Switches, and Merchant Silicon Rob Sherwood Open Networking Summit 2014

2 Application Plane Big Virtual Switch Control Plane Big Network Controller Data Plane Switch Light for Broadcom Switch Light for Linux

3 THIS YEAR: SDN FABRICS ON BARE METAL Big Switch s Core Technologies SDN: control separated from data plane: centralized, automated Switch Light: own both the Controller and Switch software stacks Commodity Hardware: low-cost hardware and merchant silicon Open: APIs, source, protocols New Fabric data plane: unified L2/L3 multipath, active/active design Live Demonstration: Resilient under systemic failure BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 3

4 WHAT S INSIDE A SWITCH? Application Network OS Hardware Driver Box Silicon BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 4

5 COMPONENT ECOSYSTEM AND BARE METAL Application Network OS Driver Box Single Vendor Closed Product Single Vendor Closed Product ODM Box SDN Controller Vendor OpenFlow SDN Hardware Vendor Vendor ODM Box Traditional Network Stack/OS Silicon ODM Chip ODM Chip Traditional Networking (past) Traditional Networking (today) OpenFlow Model Bare Metal Vision BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 5

6 SWITCH LIGHT IS SDN ON BARE METAL The OpenFlow Ecosystem Model didn t work for us Hard: one OF agent that is all things to all people OF Wire protocol is (mostly) fine, but needs work for existing hardware Economic incentives are backwards for SDN hardware vendors Out-of-phase release cycles caused low feature velocity Switch Light Model: download OS image and OF agent from Controller Easy : Customize switch software to application and controller version Add extensions to wire protocol to validate before standardization Perfect economic incentives One engineering team high feature velocity BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 6

7 BARE METAL + MERCHANT SI: LOWERS FABRIC COSTS Financial Benefit of SDN Business Agility is Increased Revenue Reduced OpEx Reduced CapEx CapEx Savings is Not Trivial Brand name network vendors are using the same components Bare metal is more than white box Name brand vs. no-name vendors Buy your network hardware just like servers Vendors already successful in the server model have advantage BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 7

8 ARCHITECTURE IS OPEN FROM THE DATA PLANE UP Open data plane Re-use existing virtualization formats: no proprietary protocols/new hardware Compatible: deployed firewalls, IDS, WAN accelerators, Server offload NICs Open control plane OF1.3: All extensions are open source and will be taken to ONF Open REST APIs is primary interface: CLI is just a REST client Integration with OpenStack/Quantum and custom BSS/OSS systems Open source components: software engineering best practice Accelerates adoption, eases porting Open Network Linux: bare metal Linux distribution in OCP Indigo Open Flow agent: many 3 rd parties have ported to their hardware BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 8

9 THIS YEAR: SDN FABRICS ON BARE METAL Big Switch s Core Technologies SDN: control separated from data plane: centralized, automated Switch Light: own both the Controller and Switch software stacks Commodity Hardware: low-cost hardware and merchant silicon Open: APIs, source, protocols New Fabric data plane: unified L2/L3 multipath, active/active design Live Demonstration: Resilient under systemic failure BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 9

10 Fabric Backplane WHAT S A FABRIC? Controller 1 Controller 2 Supervisor 1 Supervisor Line Card Line Card Line Card Line Card Line Card Chassis-based Fabric - Fabric BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 10

11 FABRIC USE-CASE (1/3): CONNECTIVITY, POLICY Server Server Most common fabric use-case Server Policy: connectivity, ACLs, QoS Server Server Server Optional VM orchestration e.g., OpenStack, HyperV Router Router BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 11

12 FABRIC USE-CASE (2/3): MONITORING Tap Traffic Existing Production Network IDS VoIP QoS Tool BigTap: Scale-out monitoring Monitoring as a Service Programmable via REST RBAC Overlapping policy support Physically isolated from prod In/out heavily over-subscribed Load balance across tools My first SDN App BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 12

13 FABRIC USE-CASE (3/3): PATCH PANEL DUT DUT Programmatically create large virtual L1 topologies DUT DUT Automate complex tests without rewiring DUT DUT Packet Generator Packet Generator Blindly forward packets by port Similar to Pseudo-wire Even CRC failures, runts, etc. *DUT: Device Under Test Non-product: in our Q/A labs BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 13

14 THIS YEAR: SDN FABRICS ON BARE METAL Big Switch s Core Technologies SDN: control separated from data plane: centralized, automated Switch Light: own both the Controller and Switch software stacks Commodity Hardware: low-cost hardware and merchant silicon Open: APIs, source, protocols New Fabric data plane: unified L2/L3 multipath, active/active design Live Demonstration: Resilient under systemic failure BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 14

15 DEMO: RESILIENCY UNDER SYSTEMIC FAILURES Primary Backup 3 4 Controller Controller Traffic Generator BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 15

16 CONCLUSION Big Switch has a common architecture for its products Based on SDN, Switch Light, Open, and Merchant Silicon Fabric technology common across applications Stepping back a bit: Industry is maturing Storage+Network+Compute convergence means new players Bare metal means less vertical integration, more competition Reality: hardware has already commoditized Every major vendor is shipping products on Broadcom Trident+/Trident2 Price war has already started: seeing less than $100/10G port Claim: Value will move up the stack in to software BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 16

17 THANKS! 2014 BIG SWITCH NETWORKS, INC. WWW. BIGSWITCH. COM 17

18 CLAIM: SDN SCALES BETTER THAN DISTRIBUTED NETWORKS History teaches us that hierarchies solve scaling problems LAN: OSPF OSPF Areas WAN: BGP BGP Route Reflectors Edge: Enterprise Wireless Enterprise Wireless controllers So of course adding SDN controllers makes data center fabrics scale better Faster bring up time, no route convergence Global knowledge global optimization Almost all commercial fabrics have controllers Different choices for who is master of state BIG S W I T C H N E T W O R K S, I N C. W W W. BIGSWITCH.COM 18

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