{"id":78627,"date":"2025-11-26T04:50:35","date_gmt":"2025-11-26T04:50:35","guid":{"rendered":"http:\/\/bangla.sitestree.com\/?p=78627"},"modified":"2025-11-26T04:50:36","modified_gmt":"2025-11-26T04:50:36","slug":"how-to-run-the-gns3-vm-inside-oracle-virtualbox","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=78627","title":{"rendered":"How to Run the GNS3 VM Inside Oracle VirtualBox"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">How to Run the GNS3 VM Inside Oracle VirtualBox<\/h2>\n\n\n\n<p>Here is a clean, fully rewritten, plagiarism-free, blog-ready version that covers <strong>both the step-by-step tutorial and the architecture diagram explanation<\/strong>, merged into one smooth article.<\/p>\n\n\n\n<p>You can publish this as-is.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>How to Run the GNS3 VM Inside Oracle VirtualBox<\/strong><\/p>\n\n\n\n<p>A Complete Guide<\/p>\n\n\n\n<p>GNS3 becomes far more powerful and efficient when paired with the <strong>GNS3 VM<\/strong>. Instead of your host machine running all routers, switches, and appliances, the load shifts into a dedicated virtual machine. While many users rely on VMware, you can run the GNS3 VM just as effectively using <strong>Oracle VirtualBox<\/strong>.<\/p>\n\n\n\n<p>This guide walks you through importing the GNS3 VM OVA file, configuring VirtualBox, linking the VM to the GNS3 desktop client, and understanding how the network paths between each component work.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Step 1: Extract the GNS3 VM ZIP File<\/strong><\/p>\n\n\n\n<p>After downloading the GNS3 VM package for VirtualBox:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Locate the ZIP file (for example, GNS3.VM.2.x.zip).<\/li>\n\n\n\n<li>Extract it using your preferred tool.<\/li>\n\n\n\n<li>Inside the extracted folder, you will find a <strong>.ova<\/strong> file \u2014 this is the VirtualBox-ready appliance.<\/li>\n<\/ol>\n\n\n\n<p><strong>What is an OVA file?<\/strong><br>It\u2019s an \u201cOpen Virtualization Appliance,\u201d a ready-to-run virtual machine packaged for import.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Step 2: Open Oracle VirtualBox<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Launch <strong>VirtualBox<\/strong>.<\/li>\n\n\n\n<li>Go to <strong>File \u2192 Import Appliance<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p>This prepares VirtualBox to load the GNS3 VM image.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Step 3: Select the OVA File<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Click <strong>Choose<\/strong>.<\/li>\n\n\n\n<li>Browse to the extracted folder.<\/li>\n\n\n\n<li>Select the .ova file and click <strong>Next<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p>VirtualBox will show a summary of the machine it is about to import.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Step 4: Adjust the Import Settings<\/strong><\/p>\n\n\n\n<p><em>(Highly recommended for performance)<\/em><\/p>\n\n\n\n<p>Before completing the import, review the resource allocation:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CPU:<\/strong> Assign at least 2 cores (more if you run complex topologies).<\/li>\n\n\n\n<li><strong>RAM:<\/strong> Minimum 4 GB; 8 GB provides much smoother performance.<\/li>\n\n\n\n<li><strong>Network Adapters:<\/strong> Keep the default NAT + Host-Only configuration.\n<ul class=\"wp-block-list\">\n<li>NAT helps the VM reach the Internet (for updates).<\/li>\n\n\n\n<li>Host-Only ensures reliable communication between your GNS3 GUI and the VM.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>MAC Address Policy:<\/strong> Keeping \u201cGenerate new MAC addresses for all adapters\u201d can help avoid conflicts.<\/li>\n<\/ul>\n\n\n\n<p>After reviewing, click <strong>Import<\/strong>. VirtualBox will create the VM automatically.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Step 5: Start the GNS3 VM<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Select the imported VM.<\/li>\n\n\n\n<li>Click <strong>Start<\/strong>.<\/li>\n\n\n\n<li>Allow the VM to boot into the GNS3 VM console (Ubuntu-based).<\/li>\n<\/ol>\n\n\n\n<p>You should see its IP address and confirmation that the GNS3 backend services are running.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Step 6: Connect GNS3 to the VM<\/strong><\/p>\n\n\n\n<p>Next, tell your GNS3 desktop application to use the VM instead of running devices locally.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Open <strong>GNS3<\/strong> on your host computer.<\/li>\n\n\n\n<li>Go to <strong>Edit \u2192 Preferences \u2192 GNS3 VM<\/strong>.<\/li>\n\n\n\n<li>Enable <strong>&#8220;Enable the GNS3 VM&#8221;<\/strong>.<\/li>\n\n\n\n<li>Select <strong>VirtualBox<\/strong> as the virtualization provider.<\/li>\n\n\n\n<li>Choose the GNS3 VM from the dropdown.<\/li>\n\n\n\n<li>Click <strong>Test Settings<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p>A successful configuration will show a message indicating that the GNS3 VM is detected and running.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>How the Host, GNS3 VM, and VirtualBox Communicate<\/strong><\/p>\n\n\n\n<p>Understanding the communication path helps troubleshoot connectivity and device start-up issues.<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-+<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; Host OS&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; (Windows\/Linux)&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;|<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; GNS3 GUI&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +&#8212;&#8212;&#8212;+&#8212;&#8212;&#8212;+<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; VirtualBox Host-Only Adapter<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +&#8212;&#8212;&#8212;v&#8212;&#8212;&#8212;+<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; GNS3 VM&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp; (Ubuntu Core)&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; Dynamips\/QEMU&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; Routers\/Switches |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +&#8212;&#8212;&#8212;+&#8212;&#8212;&#8212;+<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Internal Networks for Lab Devices<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +&#8212;&#8212;&#8211;v&#8212;&#8212;&#8211;+<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; | Virtual Routers |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; | Virtual Switches|<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp; VPCS \/ PCs&nbsp;&nbsp;&nbsp; |<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;+<\/p>\n\n\n\n<p><strong>How the pieces interact:<\/strong><\/p>\n\n\n\n<p><strong>1. GNS3 GUI on the Host OS<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You design topologies.<\/li>\n\n\n\n<li>Commands and device operations are sent to the VM through the Host-Only network.<\/li>\n<\/ul>\n\n\n\n<p><strong>2. GNS3 VM running inside VirtualBox<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Performs the heavy emulation work.<\/li>\n\n\n\n<li>Handles IOSv, IOSvL2, QEMU images, VPCS, Docker containers, and more.<\/li>\n\n\n\n<li>Reduces CPU\/RAM load on your host.<\/li>\n<\/ul>\n\n\n\n<p><strong>3. VirtualBox Network Adapters<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Host-Only Adapter:<\/strong><br>Used for stable host \u21c4 VM communication.<\/li>\n\n\n\n<li><strong>NAT Adapter:<\/strong><br>Allows the VM to access the internet.<\/li>\n\n\n\n<li><strong>Internal GNS3 Networks:<\/strong><br>Used by devices inside your topologies to talk to each other.<\/li>\n<\/ul>\n\n\n\n<p>This architecture ensures that your host machine remains responsive while the VM handles networking workloads.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Final Thoughts<\/strong><\/p>\n\n\n\n<p>Running the GNS3 VM within Oracle VirtualBox is a powerful solution that avoids the need for VMware products while providing the same performance benefits. Once the VM is imported, configured, and linked with the GNS3 client, you can run large labs with routers, switches, firewalls, and servers \u2014 all inside a controlled virtual environment.<\/p>\n\n\n\n<p>If you want, I can also prepare:<\/p>\n\n\n\n<p>\u2705 A companion guide for configuring VirtualBox network adapters<br>\u2705 A troubleshooting section for common GNS3 VM errors<br>\u2705 A printable PDF version of this guide<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to Run the GNS3 VM Inside Oracle VirtualBox Here is a clean, fully rewritten, plagiarism-free, blog-ready version that covers both the step-by-step tutorial and the architecture diagram explanation, merged into one smooth article. You can publish this as-is. How to Run the GNS3 VM Inside Oracle VirtualBox A Complete Guide GNS3 becomes far more &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"http:\/\/bangla.sitestree.com\/?p=78627\">Continue reading<\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1978],"tags":[],"class_list":["post-78627","post","type-post","status-publish","format-standard","hentry","category-computer-networks","item-wrap"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":78441,"url":"http:\/\/bangla.sitestree.com\/?p=78441","url_meta":{"origin":78627,"position":0},"title":"How to import GNS VM into VirtualBox","author":"Sayed","date":"September 1, 2025","format":false,"excerpt":"Perfect \ud83d\udc4d Here\u2019s a copyright-free infographic style summary of how to import GNS3 VM into VirtualBox \u2014 short, clean, and ready for FB\/blog use: (ChatGpt) Similar steps worked for me. \ud83d\ude80 Importing GNS3 VM into VirtualBox \u2013 Quick Guide \ud83d\udce5 1. Download Get the GNS3 VM (VirtualBox .ova file) from\u2026","rel":"","context":"In &quot;Computer Networks&quot;","block_context":{"text":"Computer Networks","link":"http:\/\/bangla.sitestree.com\/?cat=1978"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78621,"url":"http:\/\/bangla.sitestree.com\/?p=78621","url_meta":{"origin":78627,"position":1},"title":"Some Details on Network Adapter Settings for GNS VM in VirtualBox","author":"Author-Check- Article-or-Video","date":"November 26, 2025","format":false,"excerpt":"Here is a polished, blog-ready rewrite \u2014 copyright-free, plagiarism-free, and integrity-safe. How to Configure Network Adapters for the GNS3 VM in VirtualBox When running the GNS3 VM inside VirtualBox, proper network adapter configuration is essential. The GNS3 GUI on your host system relies on these adapters to communicate with the\u2026","rel":"","context":"In &quot;Computer Networks&quot;","block_context":{"text":"Computer Networks","link":"http:\/\/bangla.sitestree.com\/?cat=1978"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78443,"url":"http:\/\/bangla.sitestree.com\/?p=78443","url_meta":{"origin":78627,"position":2},"title":"How to configure VirtualBox adapters for your GNS3 VM with GNS3 GUI.","author":"Sayed","date":"September 1, 2025","format":false,"excerpt":"How to configure VirtualBox adapters for your GNS3 VM with GNS3 GUI. Perfect! Here\u2019s a step-by-step guide to configure VirtualBox adapters for your GNS3 VM so everything communicates properly with your host and GNS3 GUI. Step 1: Open VirtualBox Settings for GNS3 VM Launch VirtualBox. Select your GNS3 VM \u2192\u2026","rel":"","context":"In &quot;Computer Networks&quot;","block_context":{"text":"Computer Networks","link":"http:\/\/bangla.sitestree.com\/?cat=1978"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78623,"url":"http:\/\/bangla.sitestree.com\/?p=78623","url_meta":{"origin":78627,"position":3},"title":"How to Configure VirtualBox Network Adapters for the GNS3 VM (with GNS3 GUI)","author":"Author-Check- Article-or-Video","date":"November 26, 2025","format":false,"excerpt":"Here is a polished, blog-ready version \u2014 fully rewritten, original, plagiarism-free, and safe for publishing. How to Configure VirtualBox Network Adapters for the GNS3 VM (with GNS3 GUI) Setting up the GNS3 VM correctly inside VirtualBox is essential if you want the GNS3 GUI on your computer to communicate smoothly\u2026","rel":"","context":"In &quot;Computer Networks&quot;","block_context":{"text":"Computer Networks","link":"http:\/\/bangla.sitestree.com\/?cat=1978"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78395,"url":"http:\/\/bangla.sitestree.com\/?p=78395","url_meta":{"origin":78627,"position":4},"title":"GNS 3 and Oracle VirtualBox &#8211; Make Them Work Together. Use VM as Devices in GNS 3.","author":"Sayed","date":"August 27, 2025","format":false,"excerpt":"How do you create a LAN segment like this in GNS3? It has two Ubuntu Virtual MachinesConnected to Oracle VirtualBox VMsOne Ubuntu\/Linux acts as the DHCP Server Another Ubuntu\/Linux acts as the DHCP Client Hints\/Steps: In Oracle VirtualBox, create two Ubuntu Machines (Virtual). These can be two new machines, or\u2026","rel":"","context":"In &quot;Computer Networks&quot;","block_context":{"text":"Computer Networks","link":"http:\/\/bangla.sitestree.com\/?cat=1978"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/bangla.sitestree.com\/wp-content\/uploads\/2025\/08\/image-12.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":78445,"url":"http:\/\/bangla.sitestree.com\/?p=78445","url_meta":{"origin":78627,"position":5},"title":"Why Do We Need the GNS3 VM?","author":"Sayed","date":"September 1, 2025","format":false,"excerpt":"Perfect \ud83d\udc4d I\u2019ll rewrite that into a fresh, copyright-free and plagiarism-free version while keeping all the important details intact. You can safely post this on your FB\/blog. \ud83d\ude80 Why Do We Need the GNS3 VM? When working with GNS3, you\u2019ll often hear about the GNS3 VM. Many beginners wonder: \u201cCan\u2019t\u2026","rel":"","context":"In &quot;Computer Networks&quot;","block_context":{"text":"Computer Networks","link":"http:\/\/bangla.sitestree.com\/?cat=1978"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78627","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=78627"}],"version-history":[{"count":1,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78627\/revisions"}],"predecessor-version":[{"id":78628,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78627\/revisions\/78628"}],"wp:attachment":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=78627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=78627"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=78627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}