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Key Takeaways
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There is a satisfaction in building things yourself. It is the same psychological hook that powers the endless stream of DIY renovation videos on your social media feeds. You watch a sixty-second clip of someone transforming a pile of lumber into a custom coffee table, and it looks ingenious, cost-effective, and uniquely tailored to their needs. It triggers a powerful "why buy when I can build?" mindset. But those viral clips rarely show the weeks of sanding, the expensive specialty tools required, or the moment three months later when the wood warps because it wasn't treated correctly.
Your network engineering team often falls for this same illusion. When a specific challenge arises, perhaps a repetitive switch update or a need to standardize router settings, the impulse to script a solution is understandable. It feels like a quick win. You have talented engineers who are fluent in Python or Ansible, and letting them build a custom tool seems like a great way to empower them while solving an immediate problem. It starts as a small project to automate a few distinct tasks, but over time, it often morphs into a sprawling ecosystem of "glue code" that holds your infrastructure together.
While these homegrown automation efforts start with good intentions and the pride of creation, they frequently turn into a hidden liability. Just like the DIY project that lacks the structural integrity of a manufactured piece, your custom scripts often lack the robustness required for an enterprise environment. You might believe you are avoiding the cost of enterprise software, but you are likely paying a much higher price in operational risk, technical debt, and resource inefficiency.
The primary issue with custom-built automation is that it fundamentally changes the job description of your network engineers without you realizing it. Maintaining a library of scripts requires version control, bug fixes, patching, and constant updates to match the evolving firmware of your multi-vendor environment.
When a hardware vendor deprecates a command or changes a syntax in their latest OS release, your custom script breaks. Suddenly, your team isn't troubleshooting the network; they are debugging the tool meant to manage the network. This creates a hidden operational tax. Your most senior architects, the people who should be designing the next generation of your connectivity strategy, end up trapped in the weeds, maintaining a fragile bespoke software stack. They spend their days refactoring code rather than optimizing network performance. While teams focus on tool maintenance, your strategic initiatives stall.
There is also a long-term risk to consider: technical bankruptcy. Homegrown tools rarely come with the kind of documentation that allows a newcomer to pick them up and run with them. They typically live entirely in the head of the engineer who wrote them. You likely have that one person on your team who understands exactly how various scripts hold everything together.
But when that engineer leaves the company, the functionality essentially leaves with them. The remaining team, confronted with the undocumented logic, cannot safely modify the code and is forced to abandon it. This triggers a costly reset. You aren't just losing an employee; you are losing the operational capability they built. Your team ends up having to start from scratch, wasting weeks or months rebuilding a solution you thought you already owned. You pay the price of development twice, only to potentially repeat the cycle with the next departure. This inability to maintain legacy scripts creates a continuous drain on resources that prevents your operations from ever truly maturing.
When an engineer writes a script to solve a specific problem, they typically code for the happy path, the ideal scenario where every parameter behaves exactly as expected. The script logs in, pushes the command, and logs out. But as you know, network environments are chaotic and unpredictable. Connections time out, devices reject credentials, and syntax errors occur.
Homegrown scripts often lack the sophisticated error-handling and validation logic required to catch these mistakes. If a script fails halfway through a critical update across a set of devices, does it have the logic to safely roll back to the previous state? Usually, the answer is no. You are left with a fragmented network in a zombie state, requiring a manual, all-hands-on-deck scramble to make the necessary fixes. This is the fundamental difference between a script and a management solution: One executes a command, the other manages the state and integrity of the infrastructure.
Perhaps the area where the DIY approach fails most critically is security. A script is a point-in-time tool; it runs when you trigger it. However, compliance is a continuous requirement that never sleeps. A script can push a secure configuration on Monday morning, but it cannot guarantee that the configuration remains compliant on Friday afternoon.
Configuration drift leads to the silent erosion of your security posture. Over time, small manual tweaks, emergency fixes, and troubleshooting changes cause devices to deviate from your golden standard. A homegrown solution typically lacks the always-on auditing capability that continuously compares device configurations against predefined standards. You need a system that watches the network constantly, flagging vulnerabilities the moment they appear, rather than waiting for you to run a script or for an external auditor to find a violation.
To truly mature your network operations, you must move beyond the allure of the quick fix. You need to shift your focus from writing code to managing architecture. By leveraging a dedicated platform that handles the heavy lifting of configuration management, backup, and compliance, you free your team from the burden of software maintenance.
This isn't about taking tools away from your engineers; it is about giving them a better foundation. It is about ensuring that your automation is as resilient as the network it supports. When you move away from the fragility of custom scripts and toward a robust, observable management strategy, you stop fixing the tools and start improving the business. You gain the ability to correlate configuration changes with performance impacts, ensuring that your network is not just automated, but truly observable and resilient.
Network Observability by Broadcom provides the automation, compliance, and recovery assurance that homegrown scripts simply cannot match. Explore how you can secure your configurations and streamline your operations by visiting our Automated Configuration Management page today.