Model-Driven SDN Experiences and Learnings with NSO

Transcript

1. Copyright © NTT Communications Corporation. All rights reserved.
   19th June, 2018 NSO Developer Days
   NTT Communications Hiroki Okui
   Model-Driven SDN Experiences and
   Learnings with NSO
   

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2. Copyright © NTT Communications Corporation. All rights reserved.
   Expectations for NSO
   

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3. Copyright © NTT Communications Corporation. All rights reserved.
   Transport SDN Goals
   

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4. Copyright © NTT Communications Corporation. All rights reserved.
   SDN Vision in NTT Com
   4
   Packet & Optical Transport Domain
   Access Domain
   VLAN/OTN
   IP/MPLS
   OTN / WDM
   Transport NW
   Controller
   CLI NETCONF SNMP
   Telemetry
   Streaming Telemetry
   Data Center
   User Site
   Orchestrator
   DC NW
   Ctrl
   Cloud
   Ctrl
   SD-WAN
   Ctrl
   OSS/BSS
   Machine Learning
   DC NW
   Ctrl
   SR/EVPN
   NW Controller
   

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5. Copyright © NTT Communications Corporation. All rights reserved. 5
   Packet & Optical Transport Domain
   Access Domain
   VLAN/OTN
   IP/MPLS
   OTN / WDM
   Transport NW
   Controller
   CLI NETCONF
   Data Center
   User Site
   Orchestrator
   DC NW
   Ctrl
   Cloud
   Ctrl
   SD-WAN
   Ctrl
   OSS/BSS
   DC NW
   Ctrl
   SR/EVPN
   NW Controller
   - Orchestrator : Multi-domain API orchestration (In-source)
   - Controller: Single-vendor/domain silos In-source
   - API Orchestration
   - Global transaction management
   Vendor
   EMS/NMS
   Vendor
   EMS/NMS
   Vendor
   Solutions
   Vendor
   Solutions
   Vendor
   EMS/NMS
   Before 2016
   

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6. Copyright © NTT Communications Corporation. All rights reserved. 6
   Packet & Optical Transport Domain
   Access Domain
   VLAN/OTN
   IP/MPLS
   OTN / WDM
   Transport NW
   Controller
   CLI NETCONF
   Data Center
   User Site
   Orchestrator
   DC NW
   Ctrl
   Cloud
   Ctrl
   SD-WAN
   Ctrl
   OSS/BSS
   DC NW
   Ctrl
   SR/EVPN
   NW Controller
   NSO
   - Now we Transport SDN team use NSO in production
   Vendor
   EMS/NMS
   Vendor
   EMS/NMS
   Vendor
   Solutions
   Vendor
   Solutions
   Vendor
   EMS/NMS
   In-source
   - API Orchestration
   - Global transaction management
   After 2016
   

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7. Copyright © NTT Communications Corporation. All rights reserved. 7
   Packet & Optical Transport Domain
   Access Domain
   VLAN/OTN
   IP/MPLS
   OTN / WDM
   CLI NETCONF
   Data Center
   User Site
   Orchestrator
   DC NW
   Ctrl
   Cloud
   Ctrl
   SD-WAN
   Ctrl
   OSS/BSS
   DC NW
   Ctrl
   SR/EVPN
   NW Controller
   NSO
   - Share our good experiences with NSO to other teams/domains
   - To break down the silos
   Vendor
   EMS/NMS
   Vendor
   EMS/NMS
   Vendor
   Solutions
   Vendor
   Solutions
   Vendor
   EMS/NMS
   In-source
   - API Orchestration
   - Global transaction management
   Our Recent Activity
   Transport NW
   Controller
   

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8. Copyright © NTT Communications Corporation. All rights reserved.
   Agile and In-source Development
   Development
   & Unit Test
   Requirement
   Design
   Developer
   Reviewer
   Review
   Verify
   propose
   QA
   Task Management
   Documentation
   Integration
   push
   Deploy
   CI
   Web hook
   Build
   Automation
   +
   Automation
   Release
   Test management
   Process Infrastructure
   Communication Virtual Environment
   File Sharing
   API First
   Development
   Environment
   

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9. Copyright © NTT Communications Corporation. All rights reserved.
   Expectations for SDN controller
   Easy Implementation
   - Driver/NBI/CLI auto generation
   - Auto CRUD Mapping (like FASTMAP)
   - Useful and Readable APIs
   Easy Integration / Easy Debugging
   - Mock and Emulator, log tracing
   - Decoupled from others and focus on configuration quality
   Safe and Robust operation
   - e.g. 2-phase atomic transaction, rollback, dry-run, sync, out-of-sync-check
   Model-Driven SDN Controller
   Orchestrator
   OSS/BSS
   

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10. Copyright © NTT Communications Corporation. All rights reserved.
    Experiences and Learnings
    

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11. Copyright © NTT Communications Corporation. All rights reserved.
    Core Switch Fabric
    1 (NETCONF NED)
    over 1000
    Green Field
    Service, OSS
    Orchestrator, OSS Frontend
    Core VPLS
    2 (CLI NED)
    over 300
    Green Field
    CLI NED
    Service, Orchestrator, OSS
    Metro Ether Ring
    1 (CLI NED)
    over 150
    Green Field
    CLI NED, Service
    Orchestrator, OSS Frontend
    Dev Experiences with NSO
    11
    2016 2018
    2017
    Prod
    Domain:
    Device types:
    Num. of Devices:
    Field
    Out-source:
    In-source:
    SR/EVPN(Testbed)
    1 (NETCONF NED)
    6
    Green Field
    N/A, all in-source
    2016 2018
    2017
    PoC
    Domain:
    Device types:
    Num. of Devices:
    Field:
    Out-source:
    Disaggregated Transport
    15 (NETCONF NED)
    25
    Green Field
    N/A, all in-source
    VPLS(Testbed)
    1 (CLI NED)
    12
    Brown field
    N/A, all in-source
    

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12. Copyright © NTT Communications Corporation. All rights reserved.
    Disaggregated Transport Network
    12
    From all-in-one ROADM to disaggregated optical components
    - Expecting CAPEX reduction, but need northbound integration
    - We’d integrated 10 vendors’ devices in our lab using NSO
    AWG
    AWG
    Vendor D
    Vendor C
    Vendor B
    Vendor A
    Vendor D
    Vendor C
    Vendor B
    Vendor A
    WSS/
    EDFA
    WSS/
    EDFA
    L2SW L2SW
    NETCONF/YANG
    AWG
    AWG
    WSS/
    EDFA
    WSS/
    EDFA
    Transport SDN Controller
    C driver D driver E driver
    B driver
    A driver F driver
    Vendor EMS
    Proprietary
    CLI
    Proprietary YANG
    

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13. Copyright © NTT Communications Corporation. All rights reserved.
    Great Experiences
    13
    Well-created multi-vendor network solution
    - Really easy implementation / integration with orchestrator
    - Definitely enhance the network operation quality
    Useful not only for production but also incubation
    - Especially for multi-vendor network like transport dis-aggregation
    Have enough capability to support brownfield deployment
    - Service Discovery, Re-deploy, Reconciliation, Ref-count check
    

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14. Copyright © NTT Communications Corporation. All rights reserved.
    Lessons Learned
    14
    It might be difficult to create perfect NETCONF/YANG
    - Almost half of YANGs we tried have some problems and cannot compiled
    - We have to dissect whether the root cause is in device or in NSO
    - Debug tool or detailed error log might be helpful
    Some vendor have higher priority to support gRPC than NETCONF
    - gRPC is easier to implement and is extensively used recently
    - Hopefully all vendors support NETCONF/YANG, but we don’t want to
    give up to adopt good and low cost devices due to lack of protocol support
    - Ideally, controller platform should support all major protocols
    Compile succeeded: 9 Have issues to compile: 7 Support gRPC before NETCONF: 1
    Disaggregated Transport Lab Trial Result
    

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15. Copyright © NTT Communications Corporation. All rights reserved.
    Future work
    15
    Expand domains where to install NSO
    - Transport → Switching → Forwarding
    Expand operation use cases
    - Currently we focus the field to apply NSO on provision / state check
    - Provision / state check → telemetry → closed loop
    Lecture and increase model-driven SDN engineer and team
    - Now we are very minority, it is our critical mission
    

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16. Copyright © NTT Communications Corporation. All rights reserved.
    Thank you!
    

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