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<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Eric X. Liu's Personal Page</title><link>/</link><description>Recent content on Eric X. Liu's Personal Page</description><generator>Hugo</generator><language>en</language><lastBuildDate>Thu, 02 Oct 2025 07:22:54 +0000</lastBuildDate><atom:link href="/index.xml" rel="self" type="application/rss+xml"/><item><title>UniFi VLAN Migration to Zone-Based Architecture</title><link>/posts/unifi-vlan-migration-to-zone-based-architecture/</link><pubDate>Mon, 22 Sep 2025 00:00:00 +0000</pubDate><guid>/posts/unifi-vlan-migration-to-zone-based-architecture/</guid><description>&lt;p&gt;Embarking on a network migration to a properly segmented VLAN architecture is a rite of passage for any serious home lab or small business operator. The goal is clear: improve security and organization by separating traffic. However, the path from a flat network to a segmented one is often paved with subtle but critical configuration details that can lead to hours of frustrating troubleshooting.&lt;/p&gt;
<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Eric X. Liu's Personal Page</title><link>/</link><description>Recent content on Eric X. Liu's Personal Page</description><generator>Hugo</generator><language>en</language><lastBuildDate>Thu, 02 Oct 2025 08:34:05 +0000</lastBuildDate><atom:link href="/index.xml" rel="self" type="application/rss+xml"/><item><title>Flashing Jetson Orin Nano in Virtualized Environments: A Technical Deep Dive</title><link>/posts/flashing-jetson-orin-nano-in-virtualized-environments/</link><pubDate>Thu, 02 Oct 2025 00:00:00 +0000</pubDate><guid>/posts/flashing-jetson-orin-nano-in-virtualized-environments/</guid><description>&lt;h1 id="flashing-jetson-orin-nano-in-virtualized-environments-a-technical-deep-dive"&gt;
Flashing Jetson Orin Nano in Virtualized Environments: A Technical Deep Dive
&lt;a class="heading-link" href="#flashing-jetson-orin-nano-in-virtualized-environments-a-technical-deep-dive"&gt;
&lt;i class="fa-solid fa-link" aria-hidden="true" title="Link to heading"&gt;&lt;/i&gt;
&lt;span class="sr-only"&gt;Link to heading&lt;/span&gt;
&lt;/a&gt;
&lt;/h1&gt;
&lt;h2 id="introduction"&gt;
Introduction
&lt;a class="heading-link" href="#introduction"&gt;
&lt;i class="fa-solid fa-link" aria-hidden="true" title="Link to heading"&gt;&lt;/i&gt;
&lt;span class="sr-only"&gt;Link to heading&lt;/span&gt;
&lt;/a&gt;
&lt;/h2&gt;
&lt;p&gt;Flashing NVIDIA Jetson devices remotely presents unique challenges when the host machine is virtualized. This article documents the technical challenges, failures, and eventual success of flashing a Jetson Orin Nano Super developer kit using NVIDIA SDK Manager in various virtualized environments, specifically focusing on QEMU/KVM virtual machines and LXC containers on Proxmox VE.&lt;/p&gt;</description></item><item><title>OpenWrt: Fix WireGuard Connectivity with MWAN3 by Excluding the VPN Endpoint</title><link>/posts/openwrt-mwan3-wireguard-endpoint-exclusion/</link><pubDate>Sun, 28 Sep 2025 00:00:00 +0000</pubDate><guid>/posts/openwrt-mwan3-wireguard-endpoint-exclusion/</guid><description>&lt;h3 id="overview"&gt;
Overview
&lt;a class="heading-link" href="#overview"&gt;
&lt;i class="fa-solid fa-link" aria-hidden="true" title="Link to heading"&gt;&lt;/i&gt;
&lt;span class="sr-only"&gt;Link to heading&lt;/span&gt;
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&lt;/h3&gt;
&lt;p&gt;When using WireGuard together with MWAN3 on OpenWrt, the tunnel can fail to establish or flap when the peer&amp;rsquo;s IP is routed into the tunnel itself. This is a classic routing bootstrap problem: WireGuard wants to route 0.0.0.0/0 into the tunnel, but the UDP packets to the peer&amp;rsquo;s public endpoint also get captured, so they never reach the Internet to bring the tunnel up.&lt;/p&gt;</description></item><item><title>UniFi VLAN Migration to Zone-Based Architecture</title><link>/posts/unifi-vlan-migration-to-zone-based-architecture/</link><pubDate>Mon, 22 Sep 2025 00:00:00 +0000</pubDate><guid>/posts/unifi-vlan-migration-to-zone-based-architecture/</guid><description>&lt;p&gt;Embarking on a network migration to a properly segmented VLAN architecture is a rite of passage for any serious home lab or small business operator. The goal is clear: improve security and organization by separating traffic. However, the path from a flat network to a segmented one is often paved with subtle but critical configuration details that can lead to hours of frustrating troubleshooting.&lt;/p&gt;
&lt;p&gt;This article documents that journey. It details the pitfalls encountered, the core networking concepts that were essential to understand, and the best practices that ultimately led to a stable, secure, and logical network design built on a zone-based firewall model.&lt;/p&gt;</description></item><item><title>Quantization in LLMs</title><link>/posts/quantization-in-llms/</link><pubDate>Tue, 19 Aug 2025 00:00:00 +0000</pubDate><guid>/posts/quantization-in-llms/</guid><description>&lt;p&gt;The burgeoning scale of Large Language Models (LLMs) has necessitated a paradigm shift in their deployment, moving beyond full-precision floating-point arithmetic towards lower-precision representations. Quantization, the process of mapping a wide range of continuous values to a smaller, discrete set, has emerged as a critical technique to reduce model size, accelerate inference, and lower energy consumption. This article provides a technical overview of quantization theories, their application in modern LLMs, and highlights the ongoing innovations in this domain.&lt;/p&gt;</description></item><item><title>Breville Barista Pro Maintenance</title><link>/posts/breville-barista-pro-maintenance/</link><pubDate>Sat, 16 Aug 2025 00:00:00 +0000</pubDate><guid>/posts/breville-barista-pro-maintenance/</guid><description>&lt;p&gt;Proper maintenance is critical for the longevity and performance of a Breville Barista Pro espresso machine. Consistent cleaning not only ensures the machine functions correctly but also directly impacts the quality of the espresso produced. This guide provides a detailed, technical breakdown of the essential maintenance routines, from automated cycles to daily upkeep.&lt;/p&gt;
&lt;h4 id="understanding-the-two-primary-maintenance-cycles"&gt;
&lt;strong&gt;Understanding the Two Primary Maintenance Cycles&lt;/strong&gt;