{"id":154,"date":"2026-07-24T16:02:39","date_gmt":"2026-07-24T14:02:39","guid":{"rendered":"https:\/\/www.lukaswojcik.com\/blog\/?p=154"},"modified":"2026-09-10T10:55:09","modified_gmt":"2026-09-10T08:55:09","slug":"multi-wan-failover-with-the-ubiquiti-unifi-ucg-fiber-setup-grounding","status":"publish","type":"post","link":"https:\/\/www.lukaswojcik.com\/blog\/en\/it-networks\/multi-wan-failover-with-the-ubiquiti-unifi-ucg-fiber-setup-grounding\/","title":{"rendered":"Multi-WAN Failover with the Ubiquiti UniFi UCG-Fiber: Setup, Grounding and Configuration"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Achieving 100% network uptime requires a solid Multi-WAN strategy. The Ubiquiti UniFi UCG-Fiber is an excellent gateway for managing multiple internet sources. This guide covers how to set up a robust three-tier failover system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Setup Architecture<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A highly resilient network requires diverse connection types to prevent a single point of failure. A reliable architecture utilizes:<\/p>\r\n\r\n\r\n\r\n<figure class=\"lw-diagram\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.lukaswojcik.com\/blog\/wp-content\/uploads\/diagrams\/hand-ucg-en.png\" width=\"1120\" height=\"580\" alt=\"Physical wiring of a UniFi UCG-Fiber with fibre and LTE line, PoE switch and the mandatory grounding of the outdoor run\">\n<figcaption>The redundancy is only as good as its wiring: two physically separate lines terminate on the gateway, and the outdoor run needs a surge protector and proper earth bonding \u2014 otherwise one strike takes both ports.<\/figcaption>\n<\/figure>\r\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>WAN1 (Primary):<\/strong> Toya (Fiber Optic) \u2013 Offers the lowest latency and highest bandwidth.<\/li>\n\n\n\n<li><strong>WAN2 (Secondary \/ Failover 1):<\/strong> Starlink \u2013 Provides independent satellite routing if the local terrestrial infrastructure fails.<\/li>\n\n\n\n<li><strong>WAN3 (Tertiary \/ Failover 2):<\/strong> ZTE 5G Modem \u2013 Acts as the final backup utilizing cellular towers.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Equipment<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For optimal integration with UniFi gear, the external modems must support bridge mode or IP passthrough to avoid Double NAT issues:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Starlink:<\/strong> The <strong>Standard (Gen 3)<\/strong>, whose router already provides two built-in Ethernet ports behind the rear cover, or the <strong>High Performance<\/strong> business model. Both allow bypassing the default Starlink router via bypass mode \u2014 no separate Ethernet adapter is required.<\/li>\n\n\n\n<li><strong>ZTE 5G Modem:<\/strong> The <strong>ZTE MC889<\/strong> outdoor ODU (Outdoor Unit). It is powered via PoE, handles harsh weather conditions, and provides a clean bridge mode directly to the UCG-Fiber.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Installation and Mandatory Grounding<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When deploying Starlink and a 5G modem on a metal mast high above the roofline, strict electrical safety protocols must be followed:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Lightning Protection:<\/strong> The metal mast must be connected directly to the building\u2019s grounding system (earth rod) using a copper wire of appropriate cross-section (e.g., 16mm\u00b2).<\/li>\n\n\n\n<li><strong>Surge Protection Panels:<\/strong> Outdoor Ethernet cables (STP &#8211; Shielded Twisted Pair) acting as antennas for lightning induction must not plug directly into core network switches. Cables should be routed down to the central distribution rack\u2014often located in a secure, climate-stable environment like a cellar\u2014and terminated on dedicated PoE surge protection panels before patching into the UCG-Fiber.<\/li>\n\n\n\n<li><strong>Cable Management:<\/strong> Ensure outdoor-rated, UV-resistant shielded cables are used.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">UniFi OS Configuration<\/h2>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Navigate to <strong>Settings &gt; Internet<\/strong> in the UniFi Network application.<\/li>\n\n\n\n<li>Select the <strong>Primary (WAN1)<\/strong> connection and assign it to the port where the Toya fiber is connected (e.g., via an SFP module).<\/li>\n\n\n\n<li>Add <strong>Secondary (WAN2)<\/strong> for Starlink. Under advanced settings, configure Load Balancing to <strong>Failover Only<\/strong> (to save power\/data) or <strong>Distributed<\/strong> if concurrent usage is preferred.<\/li>\n\n\n\n<li>Add <strong>Tertiary (WAN3)<\/strong> for the ZTE 5G modem, setting its priority lower than Starlink.<\/li>\n\n\n\n<li>Adjust <strong>Echo Server<\/strong> settings (e.g., pinging 1.1.1.1 and 8.8.8.8) to ensure the UCG-Fiber accurately detects an outage and initiates the failover seamlessly.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This guide outlines the implementation of a resilient triple-WAN failover system using the Ubiquiti UniFi UCG-Fiber. By combining a fiber-optic primary connection (Toya) with satellite (Starlink) and cellular (ZTE 5G) backups, a constant internet connection is maintained. The article emphasizes the necessity of professional grounding for roof-mounted equipment and provides technical steps for configuring load balancing and echo servers within the UniFi OS environment.<\/p>\n\n\n<div class=\"lw-quellen\">\n<h2>Sources<\/h2>\n<ul>\n<li><a href=\"https:\/\/help.ui.com\/hc\/en-us\/articles\/360012192813-Introduction-to-UniFi\" target=\"_blank\" rel=\"noopener noreferrer\">Introduction to UniFi<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Achieving 100% network uptime requires a solid Multi-WAN strategy. The Ubiquiti UniFi UCG-Fiber is an excellent gateway for managing multiple internet sources. This guide covers how to set up a robust three-tier failover system. The Setup Architecture A highly resilient network requires diverse connection types to prevent a single point of failure. A reliable architecture [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19780,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[91113,91243,91219,91707],"class_list":["post-154","post","type-post","status-publish","format-standard","hentry","category-it-networks","tag-homelab","tag-networking","tag-tutorial","tag-unifi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Multi-WAN Failover with the Ubiquiti UniFi UCG-Fiber: Setup, Grounding and Configuration - Lukas Wojcik - Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lukaswojcik.com\/blog\/en\/it-networks\/multi-wan-failover-with-the-ubiquiti-unifi-ucg-fiber-setup-grounding\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Multi-WAN Failover with the Ubiquiti UniFi UCG-Fiber: Setup, Grounding and Configuration - Lukas Wojcik - Blog\" \/>\n<meta property=\"og:description\" content=\"Achieving 100% network uptime requires a solid Multi-WAN strategy. 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