{"id":78447,"date":"2025-09-01T19:17:13","date_gmt":"2025-09-01T19:17:13","guid":{"rendered":"http:\/\/bangla.sitestree.com\/?p=78447"},"modified":"2025-09-01T19:17:14","modified_gmt":"2025-09-01T19:17:14","slug":"which-router-to-use-in-gns3","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=78447","title":{"rendered":"Which Router to Use in GNS3"},"content":{"rendered":"\n<p>Here\u2019s a <strong>copyright-free and plagiarism-free version<\/strong> of <em>Which Router to Use in GNS3<\/em>:<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Which Router to Use in GNS3<\/h1>\n\n\n\n<p>When you start building labs in GNS3, one of the first choices you\u2019ll face is <strong>which router type to use<\/strong>. Each option has different features, requirements, and performance considerations.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">1. Cisco Dynamips Routers (Old IOS Images)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>What they are:<\/strong> These use the classic Cisco IOS images (12.x) and run on the Dynamips emulator.<\/li>\n\n\n\n<li><strong>Why use them:<\/strong> Great for beginners practicing routing basics, ACLs, NAT, and standard CCNA topics.<\/li>\n\n\n\n<li><strong>Advantages:<\/strong> Lightweight, fast, and works even without the GNS3 VM.<\/li>\n\n\n\n<li><strong>Limitations:<\/strong> Only supports older IOS versions, so some modern features are missing.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. Cisco IOSv (Virtual IOS)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>What it is:<\/strong> A virtualized version of Cisco IOS 15.x that runs inside QEMU\/KVM.<\/li>\n\n\n\n<li><strong>Why use it:<\/strong> Recommended for advanced labs, CCNP, or when you need newer IOS commands.<\/li>\n\n\n\n<li><strong>Advantages:<\/strong> Modern features, closer to what you find on real Cisco routers.<\/li>\n\n\n\n<li><strong>Limitations:<\/strong> Requires more CPU\/RAM and usually needs the GNS3 VM for stable performance.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. Cisco IOSvL2 (Virtual Switch)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>What it is:<\/strong> A virtual Cisco Layer 2 switch image for GNS3.<\/li>\n\n\n\n<li><strong>Why use it:<\/strong> Provides switching labs with VLANs, STP, trunking, and EtherChannel.<\/li>\n\n\n\n<li><strong>Advantages:<\/strong> Essential for CCNA\/CCNP switch practice.<\/li>\n\n\n\n<li><strong>Limitations:<\/strong> Not a full Catalyst switch replacement; some advanced features are not available.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. Cisco ASA and Security Devices<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>What they are:<\/strong> Virtualized Cisco ASA firewalls and security appliances.<\/li>\n\n\n\n<li><strong>Why use them:<\/strong> Needed for labs involving VPNs, firewalls, and security studies.<\/li>\n\n\n\n<li><strong>Advantages:<\/strong> Lets you practice real firewall and security policies.<\/li>\n\n\n\n<li><strong>Limitations:<\/strong> Resource intensive, must run in GNS3 VM.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. Other Vendor Routers<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>What they are:<\/strong> Images from FortiGate, Palo Alto, Juniper, and F5 that run in GNS3 VM.<\/li>\n\n\n\n<li><strong>Why use them:<\/strong> Useful for multi-vendor labs, real-world scenarios, and preparing for jobs outside Cisco-only environments.<\/li>\n\n\n\n<li><strong>Advantages:<\/strong> Broadens your experience beyond Cisco.<\/li>\n\n\n\n<li><strong>Limitations:<\/strong> Needs more resources and sometimes licensing steps.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 Recommendations<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>For beginners (CCNA):<\/strong> Start with <strong>Dynamips routers<\/strong> \u2014 simple, lightweight, and quick to configure.<\/li>\n\n\n\n<li><strong>For advanced routing labs (CCNP\/realistic):<\/strong> Use <strong>IOSv and IOSvL2<\/strong> in GNS3 VM.<\/li>\n\n\n\n<li><strong>For security engineers:<\/strong> Add <strong>ASA or third-party firewalls<\/strong>.<\/li>\n\n\n\n<li><strong>For enterprise\/multi-vendor practice:<\/strong> Combine Cisco IOSv with FortiGate, Palo Alto, or Juniper appliances.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\ud83d\udc49 In short:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Small, lightweight labs \u2192 Dynamips<\/strong><\/li>\n\n\n\n<li><strong>Modern and realistic labs \u2192 IOSv\/IOSvL2<\/strong><\/li>\n\n\n\n<li><strong>Security\/firewall labs \u2192 ASA\/other vendors<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Do you want me to also prepare this into a <strong>Word (.docx) file<\/strong> so you can use it directly as a guide?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here\u2019s a copyright-free and plagiarism-free version of Which Router to Use in GNS3: Which Router to Use in GNS3 When you start building labs in GNS3, one of the first choices you\u2019ll face is which router type to use. Each option has different features, requirements, and performance considerations. 1. Cisco Dynamips Routers (Old IOS Images) &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"http:\/\/bangla.sitestree.com\/?p=78447\">Continue reading<\/a><\/p>\n","protected":false},"author":2,"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-78447","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":78625,"url":"http:\/\/bangla.sitestree.com\/?p=78625","url_meta":{"origin":78447,"position":0},"title":"Polished: How to Find and Import Cisco Router Images (BIN\/IMAGE) Into GNS3","author":"Author-Check- Article-or-Video","date":"November 26, 2025","format":false,"excerpt":"Polished: How to Find and Import Cisco Router Images (BIN\/IMAGE) Into GNS3 (By ChatGPT) To use classic Cisco routers such as the 3725 in your GNS3 labs, you\u2019ll need the correct IOS image files. This guide explains where to find them, where to store them, and how to import them\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":78449,"url":"http:\/\/bangla.sitestree.com\/?p=78449","url_meta":{"origin":78447,"position":1},"title":"How to Import Router C3725 in GNS3","author":"Sayed","date":"September 1, 2025","format":false,"excerpt":"Import C3725 in GNS3 Edit \u2192 Preferences \u2192 Dynamips \u2192 IOS Routers \u2192 New. Browse to your c3725-...bin IOS image. \u2192 Copy to images dir \u2192 Decompress. Platform: c3725 \u2192 RAM: 256 MB. Add modules in Slots: NM-1FE-TX (FastEthernet ports) NM-16ESW (switch module) WIC-2T (serial links). Idle-PC \u2192 Auto compute\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\/09\/image.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":78445,"url":"http:\/\/bangla.sitestree.com\/?p=78445","url_meta":{"origin":78447,"position":2},"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":[]},{"id":78627,"url":"http:\/\/bangla.sitestree.com\/?p=78627","url_meta":{"origin":78447,"position":3},"title":"How to Run the GNS3 VM Inside Oracle VirtualBox","author":"Author-Check- Article-or-Video","date":"November 26, 2025","format":false,"excerpt":"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\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":78447,"position":4},"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":78447,"position":5},"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":[]}],"_links":{"self":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78447","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\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=78447"}],"version-history":[{"count":1,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78447\/revisions"}],"predecessor-version":[{"id":78448,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78447\/revisions\/78448"}],"wp:attachment":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=78447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=78447"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=78447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}