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Virtualizing the Cable Access Network

Transformation through virtualization

Begin the next phase of your network’s transformation by virtualizing your headends with cloud-native technology. Introduce the dynamic scale and agility your network needs to deliver the services your customers want.

Going cloud native

Navigate your way towards virtualizing your headend by going cloud native. Discover your path for migrating headend functions to the cloud and turning dedicated hardware into scalable software.

The economics of cloud CMTS

Benefits of virtualizing your headend with Cisco’s Cloud Native Broadband Router(cnBR)


Subscribers per headend i This figure is the estimated number of DOCSIS subscribers per Data Center, Headend or Hub area. The total number of subscribers is used to calculate the total RPD’s per service area.


Subscribers per RPD i This figure is the estimated number of subscribers per Remote PHY device (RPD). The subscribers per RPD is also used to calculate the total RPD’s per service area.


Average DOCSIS devices per subscriber i This figure is the estimated number of DOCSIS devices within a subscribers home. The devices per home includes Cable Modems (CM’s) as well as DOCSIS Set-top Gateways (DSG’s). This figure is used to calculate the total number of DOCSIS devices supported per Cloud Native server.


Downstream Bandwidth per RPD (Gbps) i Downstream Bandwidth per RPD. The upper limit maximum is set to 9.0 Gbps and lower limit is set to 0.3 Gbps.


Upstream Bandwidth per RPD (Gbps) i Upstream Bandwidth per RPD. The upper limit maximum is set to 6 Gbps and lower limit is set to 0.05 Gbps.


Over subscription factor (n:1) i This figure is the ratio that the Data Plane bandwidth (DP) per server is over-subscribed relative to the provisioned bandwidth per RPD. An oversubscription factor of 1.0 (1:1 ratio) equates to no over-subscription.

CapEx Savings
OpEx Savings
Space Savings


Please reduce subscribers per RPD and/or DOCSIS devices per subscriber to remove error

Please contact your local Cisco Sales Team for a Cloud Native analysis customized to your network; or if you are a Cisco employee, please log in to Cisco.com

Base Three Node Cluster i Three server clusters running platform cluster infrastructure and management

SG's per Base server (RPD's)

RPD's per worker node

Expansion Server Configuration i Expansion servers running DOCSIS CCAP control and routing functions only

SG's per Expansion server (RPD's)

Modems per worker node

Operations Hub (OpsHub) Cluster i Operations HUB provides cnBR management to install, management and monitor cnBR clusters

Ops Hub servers per 12+1 cluster

Max. 12+1 clusters per Op's Hub

HA Servers

HA servers per 12+1 cluster

cnBR Clusters per Headend

Total Base Servers

Total Expansion Servers

Total Data plane servers

Total HA servers

Total Op's Hub Servers

Total Servers

RPD's per Headend

Total 12+1 clusters

Traditional CCAP

Total Traditional CCAP Power(KW)

Total Traditional CCAP chassis


Total cnBR power (kW)

White paper: Cloud-Native Network Functions (CNFs)

Virtualization has evolved with cloud-native principles. Discover how cloud-native functions deliver on the economics, efficiencies, and agilities that virtual network functions once promised. Learn how going cloud native will help you achieve web-scale.

Go cloud native

Virtualize your headend hardware and transform how you operate, develop, and deploy services with the Cisco Cloud Native Broadband Router (cnBR).

Cloud-native DevOps

Bring the cloud-native DevOps to your DOCSIS network. Agilely deploy new services and features.

Continue your cable network transformation