![[Day #32 PyATS Series] Tracing End-to-End Path (Multi-Hop Traceroute Validation) Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-32-PyATS-Series-Tracing-End-to-End-Path-Multi-Hop-Traceroute-Validation-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction End-to-end path validation is a crucial part of network troubleshooting and performance analysis. Traceroute is one of the most widely used diagnostic tools to trace the path packets take across multiple hops in a network. However, manually running traceroute on individual devices and comparing […]
![[Day #31 PyATS Series] Detect VLAN Mismatches on Trunk Links Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-31-PyATS-Series-Detect-VLAN-Mismatches-on-Trunk-Links-Using-pyATS-for-Cisco.png)
Introduction Detecting VLAN mismatches on trunk links is crucial for maintaining seamless Layer 2 connectivity across a network. A VLAN mismatch can lead to traffic drops, inconsistent broadcast domains, and ultimately network instability. Traditional troubleshooting involves manually logging into each switch and comparing trunk configurations—a […]
![[Day #30 PyATS Series] Checking STP Root Bridge Across Cisco Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-30-PyATS-Series-Checking-STP-Root-Bridge-Across-Cisco-Using-pyATS-for-Cisco.png)
Introduction Spanning Tree Protocol (STP) is a fundamental Layer 2 protocol used to prevent loops in switched networks. One critical aspect of STP is determining the Root Bridge, which plays a central role in defining the active forwarding paths. Manually verifying STP root bridges across […]
![[Day #29 PyATS Series] Loopback IP Reachability Validation (Ping Tests) Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day29-PyATS-Series-Loopback-IP-Reachability-Validation-Ping-Tests-Using-pyATS-for-Cisco.png)
Introduction In large-scale enterprise and service provider networks, Loopback interfaces play a crucial role in routing protocols, management access, and network stability. Ensuring continuous reachability of loopback IPs is a key part of proactive network monitoring. Manual ping testing can be tedious and prone to […]
![[Day #25 PyATS Series] OSPF Adjacency Validation Across Cisco/Arista/Palo Alto/Fortigate Using pyATS [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/07/Day25-PyATS-Series-OSPF-Adjacency-Validation-Across-Cisco_Arista_Palo-Alto_Fortigate-Using-pyATS.png)
Introduction Open Shortest Path First (OSPF) is a critical Interior Gateway Protocol (IGP) for routing within an enterprise or data center network. Verifying OSPF adjacencies manually across multi-vendor environments—Cisco, Arista, Palo Alto, and Fortinet—can be time-consuming and error-prone. With pyATS, network engineers can automate OSPF […]
![[Day #24 PyATS Series] BGP Neighbor Validation (Multi-Vendor) Using pyATS for Cisco](https://networkjourney.com/wp-content/uploads/2025/07/Day-24-PyATS-Series-BGP-Neighbor-Validation-Multi-Vendor-Using-pyATS-for-Cisco.png)
Introduction Border Gateway Protocol (BGP) is the backbone of modern enterprise and service provider networks, enabling scalable routing between different autonomous systems. Validating BGP neighbor relationships across a multi-vendor environment is critical for ensuring routing stability and avoiding outages. Traditionally, engineers log into each device […]
![[Day #23 PyATS Series] Interface Error Counters Monitoring Using pyATS for Cisco](https://networkjourney.com/wp-content/uploads/2025/07/Interface-error-counters-monitoring.png)
Introduction Monitoring interface error counters is crucial in maintaining a healthy network. Errors such as input drops, CRC errors, and collisions can significantly degrade performance and lead to network outages. Traditionally, network engineers manually run show interfaces commands on each device to track these errors—a […]
![[Day #22 PyATS Series] Interface Status Check Across Vendors Using pyATS for Cisco](https://networkjourney.com/wp-content/uploads/2025/07/Day22-PyATS-Series-Interface-Status-Check-Across-Vendors-Using-pyATS-for-Cisco.png)
Introduction In every production network, ensuring interface health and status consistency across devices is crucial. A single downed port can lead to outages, suboptimal routing, or even compliance issues. Traditionally, engineers log into each device to verify interface states, which is error-prone and time-consuming. With […]
![[Day #21 Pyats Series] VLAN database validation before/after changes using pyATS for Cisco](https://networkjourney.com/wp-content/uploads/2025/07/Day21-PyATS-Series-VLAN-Database-Validation-Before_After-Changes-Using-pyATS-for-Cisco.png)
Introduction In modern enterprise networks, VLAN management is crucial for traffic segmentation and security. Manual VLAN database validation often leads to human errors and downtime during changes. This is where pyATS, Cisco’s test automation framework, shines. In this article, we’ll learn how to automate VLAN […]
![[Day#1c PyATS Series] Why pyATS? Why not just stick to Netmiko / NAPALM / Paramiko which are easier? [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/07/Day1c-PyATS-Series-Why-pyATS-Why-not-just-stick-to-Netmiko-NAPALM-Paramiko-which-are-easier-Python-for-Network-Engineer.png)
Many network engineers ask: “Why should I learn pyATS when simpler options like Netmiko or NAPALM already exist?” Let’s break it down. What Netmiko and NAPALM Offer Netmiko and NAPALM are excellent tools for: These libraries are lightweight and ideal for ad-hoc automation or one-off […]
