On the Management of Virtual Networks

On the Management of Virtual Networks

Group 3Yang Wenzhi 3474953Wang Qian 3430773Issam Alkindi 3444783Zhu Guangjin 3440223Zhang Haifeng 3392273Sanjeev Maharjan3480473

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Agenda

Introduction of Network Virtualization Environments and its management

Initiatives for the Management of NVEs

Research Perspectives

Conclusion

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Network Virtualization Environments

Creating a virtual version of computing systems to hide the physical characteristics of a computing platform from users, instead showing another abstract one.

NVE enables diverse network architectures to coexist in a shared physical infrastructure without affecting each other.

Why Network Virtualization Environments?● Energy Consumption

● Easily Controlled and Inspected (C)

● Provisioned as Needed (P)

● Easily Relocated (S)

● Disaster Recovery (F)

Effective&

Reliable

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What will NVEs Change?

• Network Devices

• Business relationships

+ Virtualization SupportRouters supporting multiple virtual routing tables,

Programmable switches, etc.

Cisco, Google, Huawei, etc.

InfrastructureProviders

ServiceProviders

• Network Management

Traditional

ISPs

InPsSPs

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Management of Network Virtualization

Environments

InPs: Providing virtual networks & Monitoring physical resources

SPs: Operating virtual networks & Providing services to end users

• SPs lease resources from different InPs

• Manually• Automatically• Virtual Nodes:

Hypervisor• Virtual Links:

VLANs, MPLS, LSPs, GRE tunnels

• Isolated in a physical one

• Operated by different SPs

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Management Targets

Management Functions

Management Approaches

NVEs

Managed components of NVEwhich belong to different layers.

How network management has been tackled by networkvirtualization projects.

Vary in how managers andagents are organized.

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MngtTargets

node

linknetwork

operation of virtual and physical nodes, i.e. initial creation& node migration

configuration and operation of physical and virtual links, i.e. link isolation &flow scheduling.

entire virtual network including those span multiple physical networks

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Supports several other management tasks, such as fault management and billing.

Mngt Functions

Allows SPs to instantiate and use virtual networks.

Defines how management applications communicate with NVE resources and enabling interoperability.

Provisioning

Monitoring

Interfacing

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Autonomic* Reduce human intervention and allows dynamic adaption to changes in the network

MngtApproaches

Policy-based* enforce isolation among virtual networks by controlling access permissions for each SP

Centralized* Responsible for performing all management tasks

Distributed* Multiple nodes cooperate to accomplish the mngt tasks

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Comparison of virtualization management proposals

Characteristic

Management target Management function Management approach

Project/proposal

Node Link Network Provisioning

Monitoring Interfacing Centralized Distributed Autonomic

4WARD

AUTOI

FEDERICA

ProtoGENI

UCLP

VNARMS

OpenFlow/FlowVisor

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Characteristic


Project/proposal



4WARD

AUTOI

FEDERICA

ProtoGENI

UCLP

VNARMS

OpenFlow/FlowVisor

Single management is not responsible for overseeing the management of InP

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Characteristic


Project/proposal



4WARD

AUTOI

FEDERICA

ProtoGENI

UCLP

VNARMS

OpenFlow/FlowVisor

A centralized network performs all administrative Management actions in the infrastructure, such asresource discovery, provisioning, and user control 12


Characteristic


Project/proposal



4WARD

AUTOI

FEDERICA

ProtoGENI

UCLP

VNARMS

OpenFlow/FlowVisor

A switch can be probably sliced and allocated to different users. One issue that FlowVisor has to deal with is managing isolation among multiple slices

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Research perspectivesFEDERATIONS AND SLA NEGOTIATIONS

enables access to larger-scale infrastructures(eg,protoGENI)

Future:guaranteeing performance for participating entities through SLA.

INTERPLAY BETWEEN INP MANAGEMENT AND SP MANAGEMENT

cooperation to avoid conflicts, ensure stability.

Future: INP:maximize the utilization of infrastructures, revenue

SP:want predictable performance for virtual networks.

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• MANAGEMENT OF VIRTUALIZED CLOUD COMPUTING ENVIRONMENTS

Dynamic resource scaling:

Dynamically modifying a previous resource allocation

Nowadays:provide elasticity at the virtual machine level.

Future:dynamic capacity adjustment of network resources (e.g.,bandwidth) requires further investigation.

Application-aware resource provisioning:

characteristics of the applications are commonly ignored

Future:Adaptive application-driven resource provisioning

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Energy management

a significant portion of the operational costs of the InP

Solutions:consolidating virtual resources into a small number of physical devices.

Future:a good trade-off between energy consumption and applications' performance

Data center network management

address configuration, traffic management,and flow scheduling.

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• MANAGEMENT OF SDNS separation of control and data planes and their implementation in

software offer flexibility in controlling how network devices forward packet

Management abstractions:

current solution to sdns : require network operators to develop customized management packages using low-level instructions of a network operating system e.g., NOX

Future:some adequate interfaces, protocols,OMNI system

Interoperability and management API:

SDNs can be deployed using virtualized forwarding resources from different providers using a variety of network operating systems and implementations.

Future:stresses a need of a widely accept of management API

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Thank you

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On the Management of Virtual Networks

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