{"slug":"troubleshoot-multiple-devices-with-the-same-100x-ip-address","title":"Troubleshoot multiple devices with the same 100.x IP address","tags":["tailscale","networking","devices"],"agent_summary":"Last validated: Mar 16, 2026","trigger_phrases":[],"runnable":false,"markdown":"\r\n# Troubleshoot multiple devices with the same 100.x IP address\r\n\r\nLast validated: Mar 16, 2026\r\n\r\nMultiple devices with the same [100.x IP address](https://tailscale.com/docs/concepts/tailscale-ip-addresses) can occur if you use a backup of one device to create another, or clone a file system from one device to another. The Tailscale configuration files are duplicated. The Tailscale files will need to be removed from one of the two.\r\n\r\nYou can identify duplicated devices in the [Machines](https://login.tailscale.com/admin/machines) page of the admin console by looking for a **Duplicate node key** badge underneath the device name.\r\n\r\nOn one of the systems, uninstall and _completely_ delete the Tailscale client. For more information, refer to [Uninstall Tailscale](https://tailscale.com/docs/features/client/uninstall). It is especially important to remove the files listed for your platform, the goal is to make a new Tailscale IP address when it is installed again. Then, reinstall the Tailscale client, by following the instructions at [Install Tailscale](https://tailscale.com/docs/install).\r\n\r\n![Project Logo](https://cdn.brandfetch.io/tailscale.com/fallback/lettermark/theme/dark/h/256/w/256/icon?c=1bfwsmEH20zzEfSNTed)\r\n\r\nAsk AI\r\n\r\nreCAPTCHA\r\n\r\nRecaptcha requires verification.\r\n\r\nprotected by **reCAPTCHA**\r\n","html":"<h1>Troubleshoot multiple devices with the same 100.x IP address</h1>\n<p>Last validated: Mar 16, 2026</p>\n<p>Multiple devices with the same <a href=\"https://tailscale.com/docs/concepts/tailscale-ip-addresses\">100.x IP address</a> can occur if you use a backup of one device to create another, or clone a file system from one device to another. The Tailscale configuration files are duplicated. The Tailscale files will need to be removed from one of the two.</p>\n<p>You can identify duplicated devices in the <a href=\"https://login.tailscale.com/admin/machines\">Machines</a> page of the admin console by looking for a <strong>Duplicate node key</strong> badge underneath the device name.</p>\n<p>On one of the systems, uninstall and <em>completely</em> delete the Tailscale client. For more information, refer to <a href=\"https://tailscale.com/docs/features/client/uninstall\">Uninstall Tailscale</a>. It is especially important to remove the files listed for your platform, the goal is to make a new Tailscale IP address when it is installed again. Then, reinstall the Tailscale client, by following the instructions at <a href=\"https://tailscale.com/docs/install\">Install Tailscale</a>.</p>\n<p><img src=\"https://cdn.brandfetch.io/tailscale.com/fallback/lettermark/theme/dark/h/256/w/256/icon?c=1bfwsmEH20zzEfSNTed\" alt=\"Project Logo\"></p>\n<p>Ask AI</p>\n<p>reCAPTCHA</p>\n<p>Recaptcha requires verification.</p>\n<p>protected by <strong>reCAPTCHA</strong></p>\n"}