![[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 #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, […]
![[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 […]
