![[Day #91 PyATS Series] Multi-Vendor VXLAN Overlay Health Validation Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/09/Day-91-PyATS-Series-Multi-Vendor-VXLAN-Overlay-Health-Validation-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction: Key Points Welcome to Day #91 of our 101 Days of pyATS series, where we focus on automating advanced network validations using Python for Network Engineer workflows. Today’s Article dives deep into multi-vendor VXLAN overlay health validation using pyATS, targeting environments that rely on […]
![[Day #72 Pyats Series] Multi-vendor pre-change snapshot automation using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Multi-vendor-pre-change-snapshot-automation-using-pyATS-for-Cisco.png)
Introduction on the Key Points In modern network operations, change management is not just about pushing configs—it’s about ensuring that changes do not unintentionally break existing services.One of the most powerful strategies to achieve this is pre-change snapshot automation, where you capture the current network […]
![[Day#60 PyATS Series] Building Reusable Validation Libraries (Multi-Vendor) using pyATS [Python for Network Engineers]](https://networkjourney.com/wp-content/uploads/2025/08/Day-60-PyATS-Series-Building-Reusable-Validation-Libraries-Multi-Vendor-Using-pyATS-for-Cisco.png)
Introduction — key points As a network engineer moving into automation, one of the most valuable skills is creating reusable validation libraries: small, well-tested units (functions/classes) that encapsulate checks like “BGP neighbor up”, “interface up”, “ACL contains permit for X”, or “ospf adjacency count”. Reuse […]
Introduction Interface MTU (Maximum Transmission Unit) mismatches are a common cause of packet drops and network performance degradation. Identifying and resolving MTU mismatches across a multi-vendor environment (Cisco, Arista, Palo Alto, Fortinet) ensures consistent communication and avoids fragmentation issues. In this 101 Days of pyATS […]
![[Day #41 PyATS Series] Validate Routing Table Entries Across Cisco/Arista/Palo Alto/Fortigate Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-41-PyATS-Series-Validate-Routing-Table-Entries-Across-Cisco-AristaPalo-AltoFortigate-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction on the Key Points Routing tables are the backbone of IP packet forwarding. Any mismatch, stale route, or missing entry can lead to packet drops, suboptimal routing, or even complete network outages. Traditionally, network engineers log in to each device and manually inspect the […]
![[Day #15 PyATS Series] Building a Reusable Test Template for All Vendors using pyATS for Cisco – Python for Network Engineer](https://networkjourney.com/wp-content/uploads/2025/07/Day15-PyATS-Series-Building-a-Reusable-Test-Template-for-All-Vendors-using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction Welcome to Day 15 of the 101 Days of pyATS (Vendor-Agnostic) journey. As a network engineer stepping into the world of automation, one of the first challenges you’ll face is code duplication. When you manage networks with multiple vendors—Cisco, Arista, Palo Alto, Fortinet—it’s common […]
![[DAY#5 PyATS Series] Connecting to Cisco/Arista/Paloalto/Fortigate devices (SSH) Using pyATS [Python for Network Engineers]](https://networkjourney.com/wp-content/uploads/2025/07/DAY5-PyATS-Series-Connecting-to-Cisco_Arista_Paloalto_Fortigate-devices-SSH-Using-pyATS-Python-for-Network-Engineers.png)
Introduction: A Real-World Take on Network Automation Have you ever been in a situation where you had to pull device inventory, verify version info, or just log into 15+ devices from different vendors like Cisco, Arista, FortiGate, or Palo Alto? It’s not fun doing that […]
