![[Day #56 PyATS Series] Automating Pre/Post Config Change Checks (Brownfield) Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-56-PyATS-Series-Automating-Pre_Post-Config-Change-Checks-Brownfield-Using-pyATS-for-Cisco.png)
Introduction on the key points When working in a brownfield network, every configuration change carries risk. You must verify what is there now (pre-check), apply a change under controlled conditions, and verify what changed (post-check). Doing this manually is slow and error-prone — especially across […]
![Day #49 PyATS Series] Check for Spanning-Tree Topology Changes (logs + CLI) using pyATS for Cisco](https://networkjourney.com/wp-content/uploads/2025/08/Day-49-PyATS-Series-Check-for-Spanning-Tree-Topology-Changes-logs-CLI-using-pyATS-for-Cisco.png)
Introduction — key points Spanning Tree Protocol (STP) topology changes — root bridge changes, port state transitions, flaps, and BPDU-related protections — are one of the most common causes of temporary outages and microbursts in switched networks. Detecting these events quickly and reliably across many […]
