Blog Posts in February 2026

After creating the infrastructure that generates the device configuration files within netlab (not in an Ansible playbook), it was time to try to apply it to something else, not just Linux containers. FRR containers were the obvious next target.

netlab uses two different mechanisms to configure FRR containers:

• Data-plane features are configured with bash scripts using ip commands and friends.
• Control-plane features are configured with FRR’s vtysh

I wanted to replace both with Linux scripts that could be started with the docker exec command.