Ansible
What Is Automation?
Automation is about turning repetitive tasks into repeatable workflows so they run consistently with less manual error.
For networking, that means reducing one-by-one switch/router changes and using a standard process that can be reused.
Why Ansible
Ansible is a practical choice because it is:
- Agentless for many workflows (typically SSH-based).
- Human-readable (playbooks and inventory are approachable).
- Broadly supported across network and server platforms.
Core Components
Ansible operation is built around three parts:
- Control Node: The management system where Ansible runs.
- Inventory: The list of managed devices and their variables.
- Managed Node: The devices Ansible connects to and configures.
Practical Outcome
Instead of manually configuring repeated access-port patterns across multiple switches, you define the desired state once and apply it consistently.
Example: if you need to prepare edge ports for printers and PCs across many switches, you can use one Ansible workflow to apply the same baseline everywhere, including access VLAN assignment, spanning-tree portfast, and port-security settings.
Without automation, each switch is a manual login and manual config. With automation, you provide a small set of inputs once and execute the same validated standard across all target devices.
This is where automation gives the most value: speed, consistency, and fewer human-made configuration errors.