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What are the key pitfalls of data centre network automation?

What are the key pitfalls of data centre network automation?

Automation can streamline data centre networking, but it presents challenges that must be overcome when planning, implementing, and using it.

Credit: Dreamstime

More than 86 per cent of companies expect their budgets for data centre network automation to increase over the next two years, and with spending ramping up, network teams need to plan carefully. 

Network automation is notoriously difficult to implement due to the complexity of networks in general, and only 23 per cent of the executives surveyed in our recent research were fully confident in their data centre network-automation strategies.

Asked to identify their biggest challenges across three stages of their automation initiatives — planning and evaluation, technology implementation, and use of automation — the common thread was the challenge of integrating and contextualising network automation with end-to-end digital infrastructure.

Planning and evaluation challenges

When planning and evaluating data centre network automation, technology organisations most often struggle to understand how it will interact with other tools and management systems (39 per cent). Network infrastructure and operations teams often have a multitude of tools for managing networks, including multiple tools for data-centre network automation. 

On top of that, other teams — including systems, storage, security, applications, and DevOps — are managing aspects of data centre operations with their own toolsets. The network team needs to think about how their automation toolchain will interact with these others.

Many organisations (37 per cent) say they are struggling significantly with planning budgets and understanding the costs associated with data centre network automation. EMA believes that the complexity of an automation initiative is to blame for the lack of clarity around costs. 

Most of the organisations surveyed are both purchasing commercial automation tools and developing home-grown automation software. It is difficult to project how much it will cost to implement and maintain this constellation of tools.

Implementation challenges

When implementing data centre network automation, 44 per cent of organisations struggle significantly with infrastructure issues. Network devices and other components in the data centre have legacy issues that make automation more difficult. 

For instance, older equipment might lack APIs, which forces the automation team to implement a solution that pushes changes to the network via command-line interface (CLI) scripts.

Even more problematic, networks often have multiple versions of vendors’ network operating systems (NOS) in production, and each NOS version might have subtle differences in CLI syntax, creating even more complexity. Network engineers have told EMA that the APIs on some of their more modern equipment are limited in scope, functionality, and quality, which creates even more infrastructure issues.

Nearly half (44 per cent) of organisations are struggling to integrate and contextualise their automation pipelines with overall application service delivery. This echoes the planning and evaluation issue of understanding how automation will interact with other systems. 

Network teams struggle to build an automation solution that allows them to push network changes with a full understanding of how those changes will affect the behavior, security, and performance of applications.

Automation use challenges

When using automation, data authority and quality issues are a major problem for 42 per cent of organisations. Data is the lifeblood of network automation. Engineers need data about the state of the network, such as device metrics and traffic flows, to understand what automated changes are required.

They also need data about network intent, such as configuration standards and security policies, to implement acceptable changes. Unfortunately, many organisations struggle to create a reliable repository of data to ensure effective automation.

As a network architect with a $50 billion consulting company described the issue, “you can push configuration to thousands of boxes, but if that configuration is wrong, you’ve created one hell of an outage.” 

Users of automaton, like planners and implementers, also worry that network changes will impact application behaviour and performance, and 40 per cent of IT organisations identified this as major issue. This struggle to contextualise and integrate network automation with the rest of digital operations was a consistent through-line in EMA’s research.

What to do

Best-in-class organisations focus on improving network compliance with automation, which will force a rigorous approach to establishing a repository of network intent data. Best-in-class companies also look for automation tools with change analysis and modelling features, which can help them understand how network changes will impact overall digital operations.

Shamus McGillicuddy is vice president of Research Networking at Enterprise Management Associates, which recently published 'The Future of Data Center Network Automation' based on a survey of enterprises, cloud providers and network service providers.


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