![[Day #90 PyATS Series] GitOps for Network Automation (pyATS + GitHub Actions) Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/09/Day-90-PyATS-Series-GitOps-for-Network-Automation-pyATS-GitHub-Actions-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction on the Key Points In modern network automation practices, GitOps has emerged as a powerful methodology to manage infrastructure as code. It bridges the gap between development and operations by leveraging Git as the single source of truth, allowing automation pipelines to trigger infrastructure […]
![[Day #48 PyATS Series] EIGRP Neighbor Health Check (Cisco IOS-XE / IOS-XR) using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-48-PyATS-Series-EIGRP-Neighbor-Health-Check-Cisco-IOS-XE-IOS-XR-using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction — key points (what you’ll learn) EIGRP neighbor stability is critical for routing convergence and network stability. Small changes in SRTT, increasing retransmissions, or flapping adjacencies can lead to route withdrawal and traffic disruption. In this masterclass you will learn how to: This is […]
![[Day #34 PyATS Series] DHCP Snooping & Binding Table Verification Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-34-PyATS-Series-DHCP-Snooping-Binding-Table-Verification-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction Dynamic Host Configuration Protocol (DHCP) Snooping is an essential security feature in enterprise networks. It acts as a firewall between untrusted hosts and trusted DHCP servers to protect against rogue DHCP attacks. Verifying the DHCP snooping configuration and ensuring the binding table’s integrity across […]
![[Day #40 PyATS Series] Identify Duplicate IPs in ARP Table Across Vendors Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-40-PyATS-Series-Identify-Duplicate-IPs-in-ARP-Table-Across-Vendors-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction on the Key Points Duplicate IP addresses are one of the most common yet frustrating issues network engineers face in multi-vendor environments. They cause intermittent connectivity issues, ARP flapping, MAC address instability, and even network outages if not detected early. As a Python for […]
![[Day #38 PyATS Series] CPU & Memory Utilization Monitoring Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-38-PyATS-Series-CPU-Memory-Utilization-Monitoring-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction Monitoring CPU and memory utilization is crucial for ensuring optimal network device performance and avoiding outages. High CPU or memory usage can indicate problems like excessive traffic, misconfigured processes, or hardware limitations. Traditionally, engineers manually check each device using CLI commands, which is tedious […]
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 #42 PyATS Series] IP SLA Monitoring Automation (Cisco-Specific) Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-42-PyATS-Series-IP-SLA-Monitoring-Automation-Cisco-Specific-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction on the Key Points In modern enterprise networks, ensuring end-to-end service availability and performance is critical. Cisco’s IP SLA (Service Level Agreement) feature allows network engineers to measure parameters such as latency, jitter, packet loss, and response times between devices. Traditionally, IP SLA statistics […]
Introduction on the Key Points Neighbor discovery protocols like CDP (Cisco Discovery Protocol) and LLDP (Link Layer Discovery Protocol) play a crucial role in identifying directly connected devices in a network. As a Python for Network Engineer practitioner, automating neighbor validation ensures accurate documentation, topology […]
![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 […]
![[Day #33 PyATS Series] VRF Configuration Consistency Check Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-33-PyATS-Series-VRF-Configuration-Consistency-Check-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction Maintaining Virtual Routing and Forwarding (VRF) configuration consistency is critical in multi-tenant or service provider networks. Misaligned VRF configurations can lead to routing leaks, traffic blackholing, and connectivity issues between VRF instances. Traditionally, network engineers manually log into each device to verify VRF names, […]
