P4 and Stratum Use Case for New Edge Cloud

Transcription

1 P4 and Stratum Use Case for New Edge Cloud NTT EAST Nobuhiko Akiyama NTT Masayuki Nishiki 1

2 About NTT and NTT Group NTT (as a holding company) and several operational companies. ü NTT group management and basic research ü NTT East/West Residential Network operator ü NTT Communications global cloud and network operator ü NTT DoCoMo mobile network operator Holding Company R&D Masa(NS Lab) Me NTT EAST NTT East NTT West Regional Communications Business NTT Communications Dimension Data Long Distance and International Communications Business NTT DOCOMO Mobile Communications Business 2 NTT Data Data Communicatio ns Business Other Businesses (IT service, solution, engineering, etc.)

3 Japanese Market NTT EAST is providing Regional fixed access service (last mile). FTTH Share FTTH: 12 million FTTH: 9 million Head Quarter Tokyo 70%

4 NTT EAST Existing Network (NGN) - A couple of thousands of Legacy edge router is in operation. - SDN has been partially deployed on a part of NFV service. - FTTH coverage has already been over 99% for couple years. NTT NGN service ISP The Internet IPoE NTT NGN Edge Router CPE CPE CPE

5 Maturity in providing FTTH service

6 Opportunity to Evolve Everything - This network is already 10 years old. Network devices are reaching EoL. - One of the barrier to deploy new architecture into existing network will be getting easier because of large amount of equipments End of Life. NTT NGN service ISP The Internet IPoE NTT NGN Edge Router CPE CPE CPE EoLL Line A Line B Line C

7 Anticipation for NEW network - Whole eco-system will be unhappy pursuing pure cost reduction. - New business must be created! to avoid reinventing another dumb pipe L - Co-operation among operators and laboratories will be beneficial path. COST REDUCTION NEW SERVICE

8 Anticipation for New network 1. Service add-on 2. Reliability A) Scalability - Service 3. Replacement 4. Scale in / out B) Reliability - N + M redundancy 5. Service Migration 6. Simple topology and chaining C) Reduce Replacement TIME - Simple management - Simple Topology 7. Open Source 8. Cost Reduction D) REDUCE Development TIME - Develop, Implement, Release - Leveraging in-market technology - Disaggregation

9 (Network) Requirement in Japan... In the U.S., you might expect a passenger rail operator to apologize for being late. However, in Japan where sleek, high-speed trains are famous for arrivals and departures that you could set your watch by leaving a station just 25 seconds early is nothing short of a disgrace. That is what happened earlier this month at Notogawa Station in the central Shiga Prefecture, when a train mistakenly pulled away from the platform almost a half-minute ahead of schedule at 7:11:35 a.m. instead of 7:12. "The great inconvenience we placed upon our customers was truly inexcusable," Japan Railways said in a statement about the May 11 incident involving a Shinkansen bullet train.

10 P4, Stratum, and UPAN Overview P4 is ASIC independent programming language to describe forwarding behavior Stratum acts as NOS agent to communicate with control plane and deal with management operations UPAN is a solution project leveraging multiple class of devices and NFVI infrastructures COTS Servers Network Control (ONOS) Feature B Feature A UPAN Overarching solution project managing entire network and individual network elements. Inculedes P4 dataplane & Stratum ASIC config (P4) ASIC control (P4Runtime) Device Config (Collect & monitor) Operation (reboot, etc.) Stratum On device NOS designed for programmable dataplane such as P4 White-Box Switches P4-enabled AISCs P4 ASIC independent language for dataplane programming

11 P4 use-cases NTT East intend to evaluate following use cases using P4 data plane switches to explore services benefits and business oportunities ü Video streaming use case (1) ü Data plane feature re-programmability use case (2) IPv6 Service Video contents Central Office New Feature PPPoE, etc. Multicast ストリーミング機能 Video Evaluation point: Forwarding performance video distribution offloading P4 dataplane 機能追加 Evaluation point: flexibility introducing new services WiFi AP Distribute video to central offices Receive video feed Enjoy new services Use case 1 Offloading video distributionfunctionalities to P4 switches Use case 2 Introduction of new service as software upgrade

12 P4 use-case 1 Using P4 switches as edge router to offload video live streaming protocol handling to improve viewer experience Programmable ASICs enables some of streaming protocol handling typically handled bystreaming server side to be offloaded to the network at the edge, which enables improved viewer experience reducing E2E delays and reducing traffic in the transport network. Packets forwarded to streaming servers eventually reflected back to viewers Streaming Server Streaming Server NTT NGN latency Traffic NTT NGN Reduce RTT avoiding transport NW ONOS CPE Legacy Router CPE Switch back at the edge (streaming offloading) CPE P4 fabric CPE Lower E2E latencies Conventional video live streaming Video live streaming leveraging P4 devices

13 P4 use-case 1 P4 switch runs with ONOS and use-case sample Apps. The switch check the packet header depending on the signal from Apps, transform the headers, and forward it. In this case, Unicast packet to multicast packet transform has been generated. 3, Forward 2, Transform P4 fabric ONOS 1, check App. Ether IP Port RTP DATA

14 P4 use-case 2 -dynamic add/remove features- Using P4 switches as edge router to enable flexibly adding and removing various data plane features as software life cycle management Adapt to various network service demands using same set of programmable hardware to reduce complexities in hardware investment planning and field deployments COTS Servers Network Control (ONOS) App PPPoE.p4 Video.p4 White-Box Switches P4-enabled AISCs

15 NTT EAST Edge Cloud Computing NTT EAST plans to start providing edge cloud computing platform and brings the expertise of NTT innovators into a collaborative environment with industry technology providers, developers and startups to move ideas to market faster. NTT Cloud Service NTT NGN Internet Cloud Service Edge Computing Platform Secure The geo location data stored will be controlled and specified. It help us treat classified data on cloud service. Edge Router CPE Low Latency last mile sub x msec

16 About NTT and NTT Group NTT (as a holding company) and several operational companies. ü NTT group management and basic research ü NTT East/West regional Fixed Network operator ü NTT Communications global cloud and network operator ü NTT DoCoMo mobile network operator Holding Company R&D Me (NS Lab) Jiro (NTT EAST) NTT East NTT West Regional Communications Business NTT Communications Dimension Data Long Distance and International Communications Business NTT DOCOMO Mobile Communications Business 16 NTT Data Data Communicatio ns Business Other Businesses (IT service, solution, engineering, etc.)

17 Our Edge concept and architecture Service Edge and cloud platform is going to be converged as Edge Cloud. Edge platform is expected to support more flexibility and scalability. Public Cloud Services Broadband access Voice services video services Public Cloud Services Broadband access DPI UTM SBC VNF infrastructure HW HW HW Mitig ation Central Datacenter SW SW SW Transport Network FTTH Offering triple play Services Basically optimized for consumer Subscriber Edge (BNG) Control plane and data plane separation Edge Cloud Transport Network HW HW HW SW SW SW FTTH Mcast UTM IoT VNF infrastructure Traffic monitoring and control Various Services with rapidly provided 17 Suitable for Business partner and their customers Edge datacenter

18 NTT R&D with open community Open source community is getting a key driver to promote innovation. To collaborate open community is getting more important for us. Users OpenStac k KVM OvS/ DPDK Recommended package customer satisfaction Achieve rapid service launches Telecom carrier network productivity and efficiency create business opportunities Collaboration Business partner Collectiv e wisdom Cloud development speed and flexibility Core developers Open community dissemination Enterprise Network OSS Hardware Investors, companies

19 How we compose BNG? To make our network more simple, scalable and flexible, we challenge to realize service edge with VNF and common hardware. There is no alternatives but to choose... Dedicated Edge Router What we need for next-gen service edge are... COTS +VNF Common hardware 19

20 Expectation for Network Programmability There are many kinds of network functions in BNG, so it is difficult to disaggregate by simply adopting COTS and white box switches. Virtualization makes our network more flexible, but it also makes it difficult to keep performance and makes our network invisible. We suppose that network programmability might become a key component to disaggregate BNG

21 P4 and Stratum P4 enables us to program what and whenever we want on hardware Stratum provide us a simple unified interface to control switches including P4. SDN Controller(e.g. ONOS) P4 P4Runtime gnmi gnoi 1) Pipeline configuration describe the structure of parser, match and action 2) Pipeline control Control lookup tables and actions 3) Device configuration set and collect configration and monitoring 4) device operation File update, device test and reboot etc. Switch OS(Stratum) table table table ingress Parse Match/ Action M/A M/A Send egress Abstraction layer Fixed ASIC Programmable Newer ASIC ASIC Copyright NTT and NTT East corp. All Rights Reserved.

22 Use cases and lab trials 22

23 Expectation to Network Programmability Use case for programmable Edge cloud We focus on two different types of use case which could support cost effective and value add network. # Cost effective network Value add network issue In the current virtualized network, we need much more COTS server to perform as fast as dedicated router. in the current network, it is difficult to manage strict traffic quality such as low latency services. Use case Disaggregate BNG c/u-plane function Platform for ultra low latency service 23

24 VNF offloading use case Disaggregate BNG with programmable Switches Disaggregated BNG enables us to fit proper resources as we just need. With programmability, we can improve resource efficiency and implement valueadd function. current NFV + DC switch (disaggregate) NFV + DC switch+p4 (disaggregate+programmable) Dedicated edge router SBC C-plane BRAS C-plane U-plane easy to deploy services App SBC BRAS C-plane BRAS U-plane server server server server Leaf SW Leaf SW Leaf SW BRAS C-plane BRAS U-plane Easy to deploy 新 App SBC less resource is needed サーバサーバサーバサーバ P4 Leaf SW P4 Leaf SW BRAS C-plane BRAS U-plane BRAS C-plane BRAS U-plane BRAS U-plane P4 Leaf SW BRAS U-plane Spine SW Spine SW 24 P4 Spine SW P4 Spine SW

25 Diagram vbng (c-plane/d-plane) PPPoE L2TP LAC IP PPP PPPoE L2TP tunnel /Session PPP IP session PPPoE client 15/0 15/1 Programmable Switch 15/2 15/3 L2TP LNS The Internet vbng (c-plane) PPPoE Data plane Offloading (PPPoE/L2TP translation using P4) L2TP LAC IP PPP PPPoE session BNG (d-plane) L2TP tunnel /Session PPP IP The Internet PPPoE client 15/0 Programmable Switch 25 15/3 L2TP LNS

26 Test Result PPPoE and L2TP translation works well on 100Gbps traffic. No packet loss PPPoE 100G L2TP 100G Tester Programmable SW Tester PPPoE L2TP 26

27 Network visibility use case Platform for ultra low latency services with INT Make network quality more visible by collecting packet by packet granularity status. Enable operator to control traffic according to the analysis result. basic use case controller advanced use case controller Feedback to network collect server analyze Put timestamp on switches to analyze if delay happens. collect server analyze server 10ms 100ms delay 10ms server 10ms 100ms delay 10ms switch 10ms 20ms 10ms 10ms 20ms 10ms Make it visible if delay might increase or not for ultra low latency services 27 reroute in advance by predicting the possibility of delay

28 Diagram and Result We can detect over-threshold of end-to-end latency in real time (Fig.1) We can also confirm that hop-by-hop latency in each switches could be figured out (Fig. 2) Spine SWID=13 40G 100G 40G 100G Fig.1 Leaf1 SWID=11 Leaf2 SWID=14 Collector 25G 25G 100G : : Switch.1 Switch.2 25G 25G Switch.3 Host1 Host2 Tester 28 Fig.2

29 NTT R&D Forum 2018 Autumn Transforming Your Digital Visions into Reality, NTT held annual exhibition in Nov.29 and 30,2018. We demonstrate our VNF offloading and INT trials at the exhibition. 29

30 Conclusion Network programmability would be a key component to realize the edge cloud platform. We confirmed that P4 has a strong possibility to support our use cases through our lab test. To make these use case more feasible, it would be important how we can integrate data-plane function with control plane. For the next step, we are going to consider how we can adopt P4 and Stratum to our network. 30

31 Backup slide 31

32 Assumed Steps for BNG disaggregation There are some hurdles to overcome to fully disaggregate BNG. Feasible architecture, VNF performance, interoperability Guarantee service level, implementation quality of each hardware and software etc Pattern#1: All in IP Edge Pattern#2: Separate SBC Box Pattern#3: Separate BAS/MC/SBC Box Pattern#4: Value-added services with chaining Radius DHCP Radius DHCP DPI UTM Radius DHCP SBC Radius DHCP SBC MCast BAS SBC MCast BAS BAS backbone/l2 NW etc MCast IP edge SBC Backbone/L2 NW etc BAS MCast IP edge Lightweight box Backbone/L2 NW etc IP edge Service function chaining Backbone/L2 NW etc IP edge Access/ aggregation Access/ aggregation Access/ aggregation Access/ aggregation # Access/aggregation side details are not depicted 32

33 Lab Testing Timeline (under planning) Evaluate P4 Use cases for BNG ü Plan to demonstrate NTT R&D Forum in Nov Apply P4/stratum for BNG ü In addition to 1 st STEP challenges, integrate ONOS/Stratum in Jan FY2018 Apr. Jun. Oct. Jan. Apr. 1 st STEP FY2019 Evaluate P4 Use cases for BNG Ø Disaggregate PPPoE Function Ø In-band-network telemetry PoC (NTT R&D Forum2018) 2 nd STEP Apply P4/stratum for BNG Ø 1 st STEP P4 use cases Ø ONOS/Stratum integration 33 PoC Collaborate w/ NTT East