[Day #61 PyATS Series] Automating ISSU (In-Service Software Upgrade) Validation Using pyATS for Cisco [Python for Network Engineer]

[Day #61 PyATS Series] Automating ISSU (In-Service Software Upgrade) Validation Using pyATS for Cisco [Python for Network Engineer]

Introduction — key points In-Service Software Upgrade (ISSU) is a powerful technique that allows upgrading the software on clustered or redundant network devices with minimal traffic disruption. But ISSU is risky: subtle control-plane events, process crashes, or platform incompatibilities can cause outages that are hard […]

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[Day #56 PyATS Series] Automating Pre/Post Config Change Checks (Brownfield) Using pyATS for Cisco [Python for Network Engineer]

[Day #56 PyATS Series] Automating Pre/Post Config Change Checks (Brownfield) Using pyATS for Cisco [Python for Network Engineer]

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 […]

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