February 14, 2022

Director of Product Marketing

Network Capacity and Service Growth: The Struggle

It’s time to look at this *struggle* in a different way, and solve it like hyperscalers… or better yet, like DriveNets.

How to support and grow network capacity efficiently is probably the No. 1 problem that service providers want (and need!) to solve today. But to be honest, there is more. Launching new services quickly and easily is not less important, as the competitive environment requires differentiation and increased ARPU.

Network Capacity and Service Growth: The Struggle

Network capacity growth requires complex and expensive operations for planning, upgrade and maintenance, leading to continuous rising costs. Deploying additional revenue-generating services usually means additional hardware and longer time-to-market.

The only solution is to build and operate networks like cloud. Cloud providers, such as AWS, MS Azure, Google Cloud and more, have in fact solved the same issues. They have developed a cloud computing infrastructure that can grow efficiently to address customer demands both in terms of resources and services.

Inspired by hyperscalers, some disruptive vendors (such as DriveNets) have taken the same path and adapted it to networks.

In fact, AT&T was the first leading service provider to drive the industry towards this evolution. AT&T is transforming its network with a software-based, cloud-native solution: AT&T’s IP core is powered by DriveNets Network Cloud solution. Many other service providers around the world are following.

It’s time to clarify how a cloud-native, disaggregated network solution solves current network scalability issues.

The compute infrastructure: easy to scale, easy to operate, fast to deploy new services

First, let’s go back to the compute infrastructure that cloud giants have built. Such infrastructure is mainly based on three technological choices:

  • Hardware standardization: removes all application-specific, proprietary hardware, and use instead only standard components (servers, switches, memory, storage…) across all applications
  • Virtualization technology: creates an abstraction layer over hardware components to build a shared pool of resources for the application layer
  • Cloud-native software: enables microservices and container-based architecture, automated by orchestration systems (i.e., Kubernetes)

As such, growing and operating this compute infrastructure is done in different ways:

  • Scale-up: Add (or remove) resources like server’s RAM to increase infrastructure capacity as long as hardware devices allow it.
  • Scale-out: Add (or remove) hardware devices to existing clusters to increase infrastructure capacity. The new cluster’s devices are managed as single entities to ease and automate operations.
  • Auto-scaling: Perform scheduled dynamic or predictive-based provisioning of compute instances on the shared infrastructure – based on provisioning policies, live monitoring of instances and infrastructure resources and workload load balancing.

Once running on the compute infrastructure, container-based applications can be deployed and scaled easily through container orchestration systems and auto-scaling systems, as delivered by cloud providers. Containers are spined up based on usage demand or application-related policies to adapt to changing traffic patterns.

With cloud computing, deploying new revenue-generating applications became fast, with high-resource efficiency.

Let’s go back to networking and network-centric services.

Many professionals in the field looked at the cloud compute evolution, and wondered if their services could also be “cloudified” and benefit from the same scalability and operational advantages.

Then, the Network Function Virtualization, or NFV, trend started. But failed, thanks to the poor performance of running a network-centric workload on standard servers. In fact, in its early years, DriveNets tried it as well, but failed like others.

A few years ago, the real solution finally came to light. With the availability of high-performance merchant silicon, networking white boxes could be built to support intensive data plane requirements. Distributed architectures emerged, as NOS vendors were able to stack these boxes and build routing solutions for the new architecture. This is the basis for the OCP Distributed Disaggregated Chassis model (DDC), and DriveNets Network Cloud.

Network Cloud: Cloud scalability for network-intensive workloads

Global internet bandwidth usage spiked 34% from 2019 to 2020, and a further 29% in 2021 to 786 Terabits per second (Tbps), thus making the reduction of cost-per-bit almost impossible for service providers (The Global Internet Phenomena, January 2022, Sandvine).

In parallel, activating a simple enterprise VPN access can take weeks, while launching new services can take up to months.

The ultimate and more effective solution is to take the hyperscalers’ approach and technology choice of compute infrastructure, and adapt it to service providers’ networks.

That’s where network cloud solutions come into play.

Such solutions (such as DriveNets Network Cloud) offer a networking-optimized, cloud-native, multiservice, shared infrastructure that addresses the growing bandwidth demand and the need for fast, new revenue-generating services. Just like a cloud computing infrastructure.

DriveNets-Network-CLoud

DriveNets Network Cloud solution

Vis-à-vis the integrated solution setup, DriveNets Network Cloud architecture provides optimal, efficient scalability:

Network Cloud

Integrated chassis

Capacity scale-out
  • When achieving maximum hardware capacity, add new standard Network Cloud Packet Forwarder (NCPs) and Network Cloud Fabric (NCFs) to increase cluster’s capacity (up to 691 Tb)
  • The increase is granular, standardized and done without service interruption
  • Operates as a single entity
  • When achieving maximum hardware capacity, an IP Clos architecture (spine/leaf), or “reap and install” to a bigger chassis approach is needed
  • The expansion is inefficient (with loss of user ports to connect chassis), complex, and requires maintenance windows
  • Each router is operated as a separate network entity
Capacity scale-up
  • Mixing and matching new and older generations of NCPs is done without extra effort
  • Standardized, flexible, and fast
  • Adding new generation line cards requires several circuit moves over a five-year chassis lifecycle
  • Complex, expensive, slow
Service
scale-out
  • Containers are spun up and down automatically on the same cluster to adapt to the service instance’s requirements
  • Adding new network services and instances as Network Cloud Network Functions (NCNF) is simply done by spinning up new containers on the same cluster without adding extra hardware
  • Efficient, fast and cost-effective
  • Monolithic software does not allow service scale-out
  • Adding new services requires additional hardware
  • High cost

 

Orchestration
  • DNOR orchestrates infrastructure resources and service instances for high scalability, resource usage efficiency, and automated operations
  • Manual operations

 

Network scalability is all about growing network capacity with resource and operational efficiency, while deploying new (and ideally, many) services quickly. Inspired by the hyperscalers, the open, disaggregated, and distributed DriveNets Network Cloud architecture solves it in the best way.

It’s time to build the future of networks, now!

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DriveNets Multiservice - Maximizing Infrastructure Utilization

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