{"slug":"troubleshoot-ip-forwarding-issues-when-advertising-subnet-routes-or-exit-nodes","title":"Troubleshoot IP forwarding issues when advertising subnet routes or exit nodes","tags":["tailscale","networking","routing","exit-nodes"],"agent_summary":"Last validated: Mar 16, 2026","trigger_phrases":[],"runnable":false,"markdown":"\r\n# Troubleshoot IP forwarding issues when advertising subnet routes or exit nodes\r\n\r\nLast validated: Mar 16, 2026\r\n\r\nTailscale's routing features ( [subnet routers](https://tailscale.com/docs/features/subnet-routers) and [exit nodes](https://tailscale.com/docs/features/exit-nodes)) require IP forwarding to be enabled. If it is not enabled, you may encounter an error when using `--advertise-routes` or `--advertise-exit-node`.\r\n\r\nFor information about how to do this for your Linux device, refer to [Enable IP forwarding](https://tailscale.com/docs/features/subnet-routers#enable-ip-forwarding).\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 IP forwarding issues when advertising subnet routes or exit nodes</h1>\n<p>Last validated: Mar 16, 2026</p>\n<p>Tailscale's routing features ( <a href=\"https://tailscale.com/docs/features/subnet-routers\">subnet routers</a> and <a href=\"https://tailscale.com/docs/features/exit-nodes\">exit nodes</a>) require IP forwarding to be enabled. If it is not enabled, you may encounter an error when using <code>--advertise-routes</code> or <code>--advertise-exit-node</code>.</p>\n<p>For information about how to do this for your Linux device, refer to <a href=\"https://tailscale.com/docs/features/subnet-routers#enable-ip-forwarding\">Enable IP forwarding</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"}