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![Ticket#9 – WAN Flap Detection: DMVPN Phase 2 Tunnel Up/Down Issue Fixed [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-Ticket-9.jpg)
Ticket#9 – WAN Flap Detection: DMVPN Phase 2 Tunnel Up/Down Issue Fixed [CCNP Enterprise]
Problem Summary The enterprise monitoring tool detected flapping tunnels between remote branch routers and the HQ hub.Ticket Priority: HighIssue: DMVPN Phase 2 Tunnel intermittently goes UP/DOWN, causing loss of reachability to HQ and apps like VoIP. Symptoms Observed Symptom Description Tunnel state flapping Tunnel interface […]
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![Ticket#8 – VOIP Choppy Audio – DSCP Marking Mismatch Fixed [QoS Real World] [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-Ticket-8.jpg)
Ticket#8 – VOIP Choppy Audio – DSCP Marking Mismatch Fixed [QoS Real World] [CCNP ENTERPRISE]
Problem Summary Users across multiple floors reported choppy VoIP audio during internal calls. The problem was intermittent but noticeable during peak hours. Symptoms Observed Root Cause Analysis Upon initial inspection, end-to-end ping and traceroute were normal. However, show policy-map interface revealed DSCP marking inconsistencies between […]
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![Ticket#7 – Multicast Video Freezes in Conference Room – Troubleshoot IGMP and PIM [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-Ticket-7.jpg)
Ticket#7 – Multicast Video Freezes in Conference Room – Troubleshoot IGMP and PIM [CCNP ENTERPRISE]
Problem Summary In a conference room, video multicast stream intermittently freezes or buffers during a live broadcast. The network uses multicast for IPTV using: Symptoms Observed Symptom Observed Impact Video Freezing Occurs every 2–3 mins IGMP joins seen But not always registered at the router […]
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![Ticket#6 – DHCP Not Working on Access Layer – Troubleshoot Snooping and Relay [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-Ticket-6.jpg)
Ticket#6 – DHCP Not Working on Access Layer – Troubleshoot Snooping and Relay [CCNP ENTERPRISE]
Problem Summary In a mid-sized enterprise campus network, multiple users reported they were unable to get IP addresses from the DHCP server. The issue was isolated to specific access switches connected to VLAN 30. The DHCP server was reachable via Layer 3 on a core […]
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![[Day#3 PyATS Series] Installing pyATS & Genie (core, NX-OS, IOS-XR plugins) using pyATS for Cisco](https://networkjourney.com/wp-content/uploads/2025/07/Day3-PyATS-Series-Installing-pyATS-Genie-core-NX-OS-IOS-XR-plugins-using-pyATS-for-Cisco_networkjouney.png)
[Day#3 PyATS Series] Installing pyATS & Genie (core, NX-OS, IOS-XR plugins) using pyATS for Cisco
Introduction on the Key Points In today’s Day #3 of our “101 Days of pyATS (Vendor-Agnostic)” blog series, we focus on setting up the essential components of pyATS by installing the core libraries and vendor-specific plugins such as NX-OS and IOS-XR. These tools are the […]
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![[Day#2 PyATS Series] Setting up Python Virtual Environments for pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/07/Day_2-PyATS-Series-Setting-up-Python-Virtual-Environments-for-pyATS-for-Cisco_networkjourney.png)
[Day#2 PyATS Series] Setting up Python Virtual Environments for pyATS for Cisco [Python for Network Engineer]
1. Introduction on the Key Points In the evolving world of network automation, learning how to integrate Python for Network Engineer tasks has become essential. If you’re a Cisco network professional looking to automate testing, validation, or configuration, pyATS (Python Automated Test System) is your […]
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![[DAY#6 PyATS Series] Using pyATS CLI tools: pyats learn, pyats parse using PyATS [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/07/DAY6-PyATS-Series-Using-pyATS-CLI-tools-pyats-learn-pyats-parse-using-PyATS-Python-for-Network-Engineer.png)
[DAY#6 PyATS Series] Using pyATS CLI tools: pyats learn, pyats parse using PyATS [Python for Network Engineer]
Introduction: Your First Step into CLI Magic with pyATS Today’s blog is all about unlocking the CLI power of pyATS, specifically: These tools are a goldmine for Python for Network Engineer workflows, especially when working across vendors like Cisco, Arista, Palo Alto, and FortiGate. By […]
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![[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)
[DAY#5 PyATS Series] Connecting to Cisco/Arista/Paloalto/Fortigate devices (SSH) Using pyATS [Python for Network Engineers]
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 […]
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![[Day#4 PyATS Series] Creating Your First testbed.yaml (Multi-Vendor Testbed) using pyATS for Cisco](https://networkjourney.com/wp-content/uploads/2025/07/Day4-PyATS-Series-Creating-Your-First-testbed.yaml-Multi-Vendor-Testbed-using-pyATS-for-Cisco_networkjourney.png)
[Day#4 PyATS Series] Creating Your First testbed.yaml (Multi-Vendor Testbed) using pyATS for Cisco
Introduction on the Key Points In Day 4 of our 101 Days of pyATS series, we’ll explore how to create your first testbed.yaml file. This file serves as the backbone for your automation scripts. Whether you are working with Cisco IOS, NX-OS, IOS-XR, or even […]
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![[DAY#9 PyATS Series] Parsing show ip interface brief across vendors using pyATS [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/07/DAY9-PyATS-Series-Parsing-show-ip-interface-brief-across-vendors-using-pyATS-Python-for-Network-Engineer.png)
[DAY#9 PyATS Series] Parsing show ip interface brief across vendors using pyATS [Python for Network Engineer]
Introduction on the Key Points We will walk through how to parse the show ip interface brief output across Cisco, Arista, Palo Alto, and FortiGate using pyATS & Genie parsers. This ensures uniformity in data interpretation, enabling us to audit reachability, interface statuses, and detect […]
