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    VNF Overview

    A virtualized network function (VNF) is a software application used in a Network Functions Virtualization (NFV) implementation that has well defined interfaces, and provides one or more component networking functions in a defined way. For example, a security VNF provides Network Address Translation (NAT) and firewall component functions.

    For the Cloud CPE solution in a centralized deployment model, you design network services for customers based on VNFs. Each VNF used in the network service is deployed in its own virtual machine (VM). The connections between VNFs depend on how VIMs define them over the NFV Infrastructure (NFVI).

    For the Cloud CPE solution in distributed deployment model, the Open vSwitch (OVS) bridges are used within the NFX hypervisor.

    You can specify the following required resources for a VNF package when you create it in Resource Designer.

    • Number of virtual CPUs
    • Virtual memory (MB)
    • Virtual disk capacity (MB)
    • License cost

    The Cloud CPE solution supports a range of Juniper Networks and third-party VNFs. Vendors can provide multiple versions of a VNF that offer differentiated performance. You can see available VNFs and their specifications and resource requirements in the VNF catalog of the Network Service Designer tool. Table 1 lists the VNFs that are currently supported by the Cloud CPE Solution.

    Table 1: VNFs Supported by the Cloud CPE Solution

    VNF Name

    Network Functions Supported

    Deployment Model Support

    Element Management System Support

    Juniper Networks vSRX

    • Network Address Translation
    • Demonstration version of Deep Packet Inspection (DPI)
    • Firewall
    • Unified Threat Management (UTM)
    • Centralized deployment
    • Distributed deployment supports firewall and UTM

    EMS microservice

    LxCIPtable (a free, third-party VNF based on Linux IP tables)

    • NAT
    • Firewall

    Centralized deployment

    EMS microservice

    Cisco Cloud Services Router 1000V Series (CSR-1000V)


    Centralized deployment

    Junos Space Network Management Platform

    Riverbed Steelhead

    WAN optimization

    Distributed deployment, NFX250 platform only

    EMS microservice

    Silver Peak VX

    WAN optimization

    Distributed deployment, NFX250 platform only

    EMS microservice


    Modified: 2017-03-30