This document summarizes an open source networking group meetup about 5G and brownfield networks. It discusses how 5G will utilize distributed micro data centers and container networking to deploy services. It also explains how an open source central controller using projects like OpenStack and OpenDaylight can provide orchestration, service paths, and abstraction of network elements. Finally, it provides examples of how container networking and an open source SDN controller can help establish service paths and enable the deployment of 5G in hybrid brownfield environments.

1. Open Source Networking Group Meetup
November 8, 2018
5G in Brownfields

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CONTENTS
1. Defining 5G
- Distributed Data Center
- Central Control
- Brownfields
2. The Role of Containers
- Orchestration
- Service Paths
3. Wrapping Up
- Use Cases
- Role of Open Source

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5G and the Future
Vehicular Telematics
Examples
Internet of Things Personalized &
On-Demand Services
(e.g. Connected Stadiums)
Drones
Big Data Sensors for
Machine Learning, AI
Emergency
Broadcast Services
Ingredients
1. Very Low Latency
2. Distributed Micro
Data Centers
3. Brownfield Networking!

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Distributing the Data Center
Why?
• Tactile applications
• Ultra scalability
• Reliability & fault remediation
Where?
• Cell sites
• Re-engineered central offices
• Network transport equipment
How?
• Highly-efficient container
networking
• Microservices
• Distributed application
orchestration
Trans-
port
SDN
Cell
Tower
Dist
Central
Office
CPE

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Need for an Open Source Central Controller
The network control plane is the
natural platform for:
1. Abstraction of “south bound” network elements
• Switches, Routers, VNFs, Paths, Tunnels
• Syslog data, operational status, monitoring of
network state
2. Delegation from OSS/BSS and orchestration tools
• ONAP, OSM, LSO
3. Support for network-wide applications and tools
• Policy, provisioning, security, analytics, inventory
ODL
Controller
OSS / BSS
Apps
(Policy,
Analytics,
Inventory)
Orch
Tools
(ONAP,
OSM,
LSO)
Log
Monitor
Status
Paths,
Topology,
Trees,
Tunnels
Switches,
Routers,
VNFs

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5G Network Diagram with Brownfield Components
Optical Transport Equipment
• Key element for network slicing
• Ability to orchestrate VNFs / distributed
apps
• Legacy switching and routing functions
controlled by CLI, APIs, NETCONF
Aggregation Routers/CMTS’s
• Key element for QoS control (e.g. PCMM)
• Subscriber network management
• Typically NETCONF control protocols
CPE Equipment
• Integrated services routers
• Costly to change / replace
• Typically managed via vendor APIs
AU
CPE
ACCESS FRONTLINE OR
AGGREGATION
BACKHAUL OR
TRANSPORT
CORE
Brownfield Network
Optical
Media
Termination
Aggregation Core
Data
Center
Mobile
Edge
Compute
+
+

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How to Serve Hybrid Environments
• Modern devices managed by
current control protocols (e.g.
NETCONF)
• Older devices controlled via CLI
• Device applications managed via
CLI and Zero Touch Provisioning
(e.g. NETCONF ZTI)
• Container networking within
devices can be managed via the
same controller using tools such as
COE
Common Open Source Controller (ODL)
End-to-end Service Instanciation
NFVi - Virtual Devices
Newer Device
Legacy Device
VNFs
Container
Network
CLI
NETCONF BGPCEP COE
Container
Orch
Engine
NETCONF
BGPCEP
Network Service Orchestration

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Container Networking Introduction
Single Host
• Docker models (Bridge, Host,
Container)
• Linux MACVLAN / IPVLAN
• Direct attachment to SRIOV
Multi Host
• Overlay:
• L2 - Flannel
• L3 - Calico
• Underlay:
• Data Center Fabric (EVPN)
• WAN-Services (IP/MPLS/OTN)
• NextGen data planes
(OpenFlow, P4, other)
IP address management
Port allocation
Veth
Pair
NIC
Bridge / OVS
Containers
NIC
MACVLAN / IPVLAN
Containers Containers
NIC
SR-
IOV

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The Container Orchestration Engine
• OpenDaylight project aimed to allow Kubernetes to use ODL as its network manager
• Can work with the OpenStack VIM
• Kuryr support
• ODL CNI Plugin
• NEW: Can manage network devices via NETCONF
• Available in OpenDaylight Fluorine
Container/ Virtual Infrastructure
Physical Network
Functions Virtual Network Functions
Container-based Applications

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Establishing Service Paths Using Intent
LUMINA
Multi-Domain PCE
Enabling Fully Automated Network Service Provisioning and Assurance
• ONAP and OSM Integrations
consume network-wide intent
• SD-Core Path Computation
Element extends service
paths across domains
• Lumina Microservices
Framework adds service
mapping and telemetry for
devices to OpenDaylight
NFVi
JSON-
RPC
NFV-O
Service Intents
Application
Controller
Control
Interfaces
Service Assurance
Legacy
PNF
White Box
Switch VNF Apps
Telemetry
VIM / Cloud
Apps Apps Apps AppsApps

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Use Cases for the SDN Controller
Network Slicing
- Partitions and configures all network
resources for a specific application
or user
- Follows the defined service intent
- Supports policy automation through-
closed loop telemetry
Application Placement
- Determines network resource
availability for applications and reports
status to an orchestrator
- Follows the defined service intent
- Supports policy automation through-
closed loop telemetry
Brownfield Adaption
- Creates an adapter and model for
legacy networking equipment
- Provides SDN and central control for
provisioning and configuration
- Allow migration to 5G without forklifts

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ONAP Leverages OpenDaylight:
SDN-C
APP-C
SDN-R
- Configures connectivity for all network devices using a directed graph
- Actively monitors and manages network traffic policies
- Controls NDs via NETCONF, OpenFlow, BGPCEP, OVSDB, CLI etc.
- Onboards virtual network functions
- Configures the network service chain for the orchestrator and VIM
- Actively monitors and manages VNF lifecycle
- Specifically aimed at configuring the radio network
- Instantiates network slices for the wireless portion
- Actively monitors radio operation and reports status

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In Summary - Action Items
• Implement agile software
practices (shorten the process
between trial and production
deployment)
• Move to PoCs and trials with
open source software
including browfield
components
• Reduce or eliminate legacy
paperwork processes that are
slow (e.g. RFIs)
• Embrace open source
platforms and work toward
interoperability especially for
existing widely-deployed
equipment
• Increase contribution toward
open source projects
• Simplify architectures to
make 5G and related
technologies easier to deploy
• Increase focus on scale,
stability and system and
interoperability testing
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