{"id":80846,"date":"2026-06-26T16:22:06","date_gmt":"2026-06-26T09:22:06","guid":{"rendered":"https:\/\/itsystems.vn\/?p=80846"},"modified":"2026-07-29T12:29:00","modified_gmt":"2026-07-29T05:29:00","slug":"5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs","status":"publish","type":"post","link":"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/","title":{"rendered":"5 Mistakes When Handling LAN Network Errors That Cost Businesses Extra"},"content":{"rendered":"<p>When businesses encounter <strong>LAN network errors<\/strong>, the first reaction is often to restart the router or immediately call a technician. However, in many cases, these hasty solutions actually make the problem more serious, leading to prolonged downtime, data loss, and unnecessary additional costs. This article will point out 5 common mistakes when handling <strong>LAN network errors<\/strong> along with standard LAN network fix methods, helping businesses save significant time and budget.<\/p>\n<p><strong>LAN network errors<\/strong> not only disrupt work but also directly affect business performance. Understanding the root causes and professional troubleshooting processes will help you avoid costly mistakes.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">The content of the article<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#Common_Signs_of_LAN_Network_Errors_in_Business_Environments\" >Common Signs of LAN Network Errors in Business Environments<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#5_Serious_Mistakes_When_Handling_LAN_Network_Errors_That_Drive_Up_Costs\" >5 Serious Mistakes When Handling LAN Network Errors That Drive Up Costs<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#1_Restarting_devices_immediately_without_diagnosis\" >1. Restarting devices immediately without diagnosis<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#2_Ignoring_checks_of_the_physical_layer_Physical_Layer\" >2. Ignoring checks of the physical layer (Physical Layer)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#3_Chaotic_DHCP_and_static_IP_configuration\" >3. Chaotic DHCP and static IP configuration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#4_Not_updating_firmware_and_network_drivers\" >4. Not updating firmware and network drivers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#5_Reactive_firefighting_instead_of_building_a_monitoring_system\" >5. Reactive firefighting instead of building a monitoring system<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#Thorough_and_Professional_LAN_Network_Fix_Methods\" >Thorough and Professional LAN Network Fix Methods<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#Why_Businesses_Should_Entrust_LAN_Network_Error_Resolution_to_Professional_Teams\" >Why Businesses Should Entrust LAN Network Error Resolution to Professional Teams<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#Building_Sustainable_LAN_Infrastructure_for_Businesses\" >Building Sustainable LAN Infrastructure for Businesses<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#Related_services_from_IT_Systems\" >Related services from IT Systems<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#FAQ\" >FAQ<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#When_should_a_business_ask_IT_Systems_for_support\" >When should a business ask IT Systems for support?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#Can_IT_Systems_help_review_the_current_environment_before_proposing_a_solution\" >Can IT Systems help review the current environment before proposing a solution?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#Does_this_topic_connect_to_ongoing_IT_operations\" >Does this topic connect to ongoing IT operations?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/itsystems.vn\/en\/5-common-mistakes-when-fixing-lan-network-errors-that-increase-business-costs\/#Need_help_applying_this_to_your_business\" >Need help applying this to your business?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Common_Signs_of_LAN_Network_Errors_in_Business_Environments\"><\/span>Common Signs of LAN Network Errors in Business Environments<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Slow LAN, frequent LAN disconnect, or sharply reduced data transmission speeds are the most noticeable symptoms. Employees often experience slow website loading, interrupted online meetings, or inability to access files on the internal server. In some cases, the LED lights on the switch flash abnormally or some computers on the network lose connection completely while others continue to function normally.<\/p>\n<p>In addition, unusually high ping, packet loss, or upload\/download speeds significantly different from normal are also clear signs of <strong>LAN network errors<\/strong>. If not addressed promptly, these issues can spread and affect the entire business network system.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5_Serious_Mistakes_When_Handling_LAN_Network_Errors_That_Drive_Up_Costs\"><\/span>5 Serious Mistakes When Handling LAN Network Errors That Drive Up Costs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Most businesses encounter one or more of the following mistakes when self-fixing LAN network issues. These errors not only fail to resolve the root cause but also create new complications.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Restarting_devices_immediately_without_diagnosis\"><\/span>1. Restarting devices immediately without diagnosis<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This is the most common mistake. Many people believe restarting the router, switch, or computer will fix <strong>LAN network errors<\/strong>. However, this only temporarily masks the problem instead of addressing the core cause. When the issue recurs, businesses waste additional time and resources handling it repeatedly.<\/p>\n<p>Restarting without recording error logs or checking previous traffic causes the IT team to lose critical data needed for root cause analysis.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Ignoring_checks_of_the_physical_layer_Physical_Layer\"><\/span>2. Ignoring checks of the physical layer (Physical Layer)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Many cases of <strong>slow LAN<\/strong> or <strong>LAN disconnect<\/strong> originate from damaged network cables, poor RJ45 contacts, or dusty switches. However, many only focus on software configuration while forgetting to inspect cables, jacks, and the physical environment. The result is hours spent configuring IP and DNS with the problem still unresolved.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Chaotic_DHCP_and_static_IP_configuration\"><\/span>3. Chaotic DHCP and static IP configuration<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When a <strong>LAN network error<\/strong> occurs, some manually assign static IPs without checking the IP range distributed by the DHCP server. This leads to IP address conflicts, causing multiple devices to disconnect simultaneously. This mistake commonly occurs in medium and large businesses without centralized IP management.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Not_updating_firmware_and_network_drivers\"><\/span>4. Not updating firmware and network drivers<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Outdated network devices with old firmware are a leading cause of <strong>slow LAN<\/strong>. Many businesses skip updating firmware for routers, switches, or network card drivers. These vulnerabilities build up over time, causing serious performance degradation and forcing earlier-than-expected hardware replacement.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Reactive_firefighting_instead_of_building_a_monitoring_system\"><\/span>5. Reactive firefighting instead of building a monitoring system<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Most businesses only address <strong>LAN network errors<\/strong> after incidents occur rather than monitoring proactively. Without bandwidth monitoring tools, alerts for rising packet loss, or redundancy plans, every outage becomes a disaster affecting overall business operations.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Thorough_and_Professional_LAN_Network_Fix_Methods\"><\/span>Thorough and Professional LAN Network Fix Methods<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To effectively fix LAN issues, follow a systematic process instead of random troubleshooting. Start by gathering information: record when the incident occurred, which devices are affected, and the specific symptoms.<\/p>\n<p>Use basic commands like <strong>ping<\/strong>, <strong>tracert<\/strong>, <strong>ipconfig<\/strong> (on Windows) or <strong>ifconfig\/ip addr<\/strong> (on Linux) to test connectivity. Check LED indicators on switches and routers to determine whether the issue is at the physical or logical layer.<\/p>\n<p>Next, test network cables with a cable tester, verify VLAN configurations if used, and identify any devices consuming excessive bandwidth. Updating firmware across all network devices and LAN card drivers on computers is an essential step.<\/p>\n<p>For larger enterprises, implementing a Network Monitoring system (such as PRTG, Zabbix, or SolarWinds) helps detect early warning signs before they escalate into major <strong>LAN network errors<\/strong>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_Businesses_Should_Entrust_LAN_Network_Error_Resolution_to_Professional_Teams\"><\/span>Why Businesses Should Entrust LAN Network Error Resolution to Professional Teams<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Mistakes in handling <strong>LAN network errors<\/strong> often result from lack of experience and specialized tools. Rather than experimenting and potentially worsening the situation, partnering with a reputable <a href=\"https:\/\/itsystems.vn\/en\/it-services-for-businesses\/it-support-services\/\">IT Support service<\/a> helps businesses save time, reduce risks, and maintain long-term network stability.<\/p>\n<p>Professional <a href=\"https:\/\/itsystems.vn\/en\/it-helpdesk-service\/\">IT Helpdesk services<\/a> not only resolve incidents quickly but also provide long-term consulting, optimize network infrastructure, and reduce future operating costs.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Building_Sustainable_LAN_Infrastructure_for_Businesses\"><\/span>Building Sustainable LAN Infrastructure for Businesses<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To avoid repeating past mistakes, businesses must shift from a &#8220;repair&#8221; mindset to &#8220;prevention.&#8221; This includes planning regular equipment upgrades, training staff to recognize warning signs, and creating standardized incident response documentation (SOP).<\/p>\n<p>Investing in high-quality network infrastructure from the start saves far more than continuously patching problems. A stable network system not only boosts productivity but also creates a competitive advantage in today&#8217;s digital business environment.<\/p>\n<p>Remember that <strong>LAN network errors<\/strong> are not unsolvable if approached correctly. By avoiding the 5 mistakes above and applying a systematic LAN network fix process, businesses can maintain stable connectivity and minimize unnecessary expenses.<br \/>\n<!-- its-deep-aio-en-related-2026-07-27 --><\/p>\n<section class=\"its-deep-aio-related\" aria-label=\"Related IT Systems services\">\n<h2><span class=\"ez-toc-section\" id=\"Related_services_from_IT_Systems\"><\/span>Related services from IT Systems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If your team is dealing with this issue in a live business environment, these services can help you move from diagnosis to a stable operating process.<\/p>\n<ul>\n<li><a href=\"https:\/\/itsystems.vn\/en\/microsoft-business-licensing\/microsoft-windows-licensing\/\">Windows licensing for business<\/a><\/li>\n<li><a href=\"https:\/\/itsystems.vn\/en\/microsoft-business-licensing\/windows-license-pricing\/\">Windows license pricing<\/a><\/li>\n<li><a href=\"https:\/\/itsystems.vn\/en\/it-services-for-businesses\/it-support-services\/\">IT support services<\/a><\/li>\n<\/ul>\n<\/section>\n<p><!-- its-deep-aio-en-faq-2026-07-27 --><\/p>\n<section class=\"its-deep-aio-faq\" aria-label=\"Frequently asked questions\">\n<h2><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"When_should_a_business_ask_IT_Systems_for_support\"><\/span>When should a business ask IT Systems for support?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ask for support when the issue affects users, business data, security, licensing compliance, service availability or daily operations. A short technical review often prevents repeated incidents and hidden costs.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_IT_Systems_help_review_the_current_environment_before_proposing_a_solution\"><\/span>Can IT Systems help review the current environment before proposing a solution?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes. IT Systems can review the current setup, identify risks, map the issue to the right service scope and recommend a practical next step for your business.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Does_this_topic_connect_to_ongoing_IT_operations\"><\/span>Does this topic connect to ongoing IT operations?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In most cases, yes. Problems around software, cloud, endpoint, network, backup or security should be connected to a broader IT operations plan instead of being handled as isolated incidents.<\/p>\n<\/section>\n<p><!-- its-deep-aio-en-cta-2026-07-27 --><\/p>\n<section class=\"its-deep-aio-cta\" aria-label=\"Contact IT Systems\">\n<h2><span class=\"ez-toc-section\" id=\"Need_help_applying_this_to_your_business\"><\/span>Need help applying this to your business?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IT Systems Vietnam can help assess the issue, recommend the right service path and support implementation for your team.<\/p>\n<p><a class=\"button\" href=\"https:\/\/itsystems.vn\/en\/contact-it-systems-vietnam\/\">Contact IT Systems<\/a> <a class=\"button\" href=\"https:\/\/itsystems.vn\/en\/it-services-for-businesses\/it-support-services\/\">View IT support services<\/a><\/p>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>When businesses encounter LAN network errors, the first reaction is often to restart the router or immediately call a technician. However, in many cases, these hasty solutions actually make the problem more serious, leading to prolonged downtime, data loss, and unnecessary additional costs. This article will point out 5 common mistakes when handling LAN network [&hellip;]<\/p>\n","protected":false},"author":54,"featured_media":80844,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"rank_math_focus_keyword":"LAN network error, slow LAN, LAN disconnect, LAN network fix ","rank_math_title":"","rank_math_description":"Discover 5 common mistakes when handling LAN network errors that cause businesses to incur significant extra costs. Expert guide to fixing slow LAN, LAN disconnect, and proper LAN network fix. Read now to avoid costly mistakes.","rank_math_robots":"","rank_math_canonical_url":"","rank_math_schema":"","footnotes":""},"categories":[2144],"tags":[],"class_list":["post-80846","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-it-guide"],"wpml_current_locale":"en_US","wpml_translations":{"vi_VN":{"locale":"vi_VN","id":80843,"slug":"5-sai-lam-khi-xu-ly-loi-mang-lan-khien-doanh-nghiep-ton-them-chi-phi-2","post_title":"5 sai l\u1ea7m khi x\u1eed l\u00fd l\u1ed7i m\u1ea1ng LAN khi\u1ebfn doanh nghi\u1ec7p t\u1ed1n th\u00eam chi ph\u00ed","href":"https:\/\/itsystems.vn\/5-sai-lam-khi-xu-ly-loi-mang-lan-khien-doanh-nghiep-ton-them-chi-phi-2\/"}},"_links":{"self":[{"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/posts\/80846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/users\/54"}],"replies":[{"embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/comments?post=80846"}],"version-history":[{"count":4,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/posts\/80846\/revisions"}],"predecessor-version":[{"id":86299,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/posts\/80846\/revisions\/86299"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/media\/80844"}],"wp:attachment":[{"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/media?parent=80846"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/categories?post=80846"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/tags?post=80846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}