HPE Aruba Networking Tips

  • [MCP Practice] Unifying Cross-Domain Network Infrastructure

    In the previous post, "How to Use AI Smarter: MCP (Model Context Protocol)," we examined the concept and necessity of MCP (Model Context Protocol), a standard protocol that enables LLMs to go beyond simple chatbots and exchange data with external systems in real time. This naturally leads to the question, "I understand the concept, but how can I apply it to my actual network operating environment?" For field engineers…

  • No interruptions in traffic even during firmware updates? The ISSU Complete Guide

    One of the first perplexing moments you experience after joining a company as a network engineer is when a senior colleague says, “We’re going to update the switch firmware at 2 AM tonight, so get ready.” Whenever you update a smartphone or PC, you always have to reboot and become unusable for a few minutes. The same applies to network switches. To upgrade the firmware version, you have to turn the equipment off and on again (Reboot), and in the meantime…

  • [Monitoring with Icinga Part 1] Basic Integration with Icinga 2 – SNMP & REST API

    1. Introduction: Infrastructure Monitoring, Why Icinga 2? When operating enterprise networks and infrastructure, Zabbix is by far the most familiar open-source monitoring tool to domestic engineers. Thanks to its intuitive web GUI, various basic templates, and an all-in-one environment consisting of a single package, it has established itself as the standard in numerous enterprise environments. However, the infrastructure operation paradigm is IaC (Infrastructure…

  • [Advanced Guide] Optical Transceiver Technology Innovations Supporting AI Data Centers (AIDC)

    As large-scale AI clusters and AIDC (AI Data Center) environments become commonplace, the core bottleneck in network engineering has shifted beyond the 'software stack' to 'Physical Signal Integrity' and 'Thermal Management.' This is because in fabrics where tens of thousands of accelerators perform all-to-all communication, even delays of just a few nanoseconds (ns) or link flaps can bring the entire collective computation to a halt. In the previous [Basic] section, GBIC's…

  • [Absolute Basic Guide] Don't I need a GBIC to plug in an optical cable?

    If you work in network engineering or at a data center, there is a question and request you hear most frequently: “We need to connect fiber optic cables to that switch, so please bring a few GBICs.‘ However, when you actually visit the site, you have likely been flustered to find that, in addition to simple optical modules, they use unusual cables with integrated cabling, and the module shapes and cable colors vary widely….

  • How to Use AI Smarter, MCP

    Recently, you have likely encountered powerful built-in AI features such as 'Agentic AI' or 'Marvis' on platforms like HPE Aruba Central or Juniper Mist. However, hasn't a thought suddenly crossed your mind? ‘Couldn’t I query and manage our company’s network status directly from Claude or VS Code, which I use regularly?‘ Today, we will move beyond simply [referring to] AI as a 'given…

  • [Aruba DevNet Lecture 5] Completing the NetOps Pipeline with Git and CI/CD

    So far, armed with Python, Ansible, and the New Central API, we have conquered the core elements of network automation one by one. However, in a real-world environment, simply having a few script files on a personal PC does not constitute true automation. Today, in the final installment of this series, we will look at how code integrates with an enterprise's IT Management (ITSM), and the latest AI…

  • [Aruba DevNet Lecture 4] Central Webhooks Meet Slack

    A network engineer's destiny is a 'battle against failures.' However, if you only become aware of a failure after receiving a call in the middle of the night, it is already too late. Today, we will build an intelligent monitoring system that utilizes Aruba Central's Webhook feature to immediately send notifications to Slack when specific events (AP Down, switch port errors, etc.) occur. What is a Webhook? Many people [discuss] APIs and Webhooks…

  • [Aruba DevNet Lecture 2] Escape Excel Hell! Organize Your Equipment Assets in 3 Seconds with Python

    In the last Lecture 1, we successfully obtained an 'Access Token' that opens the door to the Aruba Central API. If you haven't seen it yet, I recommend watching Lecture 1 first! Today, we will use that token to perform a task that is truly 'profitable and time-efficient.' It is none other than the network administrator's eternal challenge: asset management (Inventory). ‘Team Leader: Currently…