> For the complete documentation index, see [llms.txt](https://docs.islandrouter.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.islandrouter.com/island-router-cli-2.3.2/commands/ip-global-context/ip-ddns-name.md). # ip ddns name ## Syntax ``` [no] ip ddns name ``` ## Syntax Description
KeywordDescription
no(Optional) Deletes an existing DDNS name.
stringThe desired DDNS host name. This must be a simple host name, not a domain name. It may consist of between 1 and 63 alphanumeric characters or a minus sign ("-"). The first character must be a letter or number.
## Defaults No DDNS name is assigned by default. ## Usage Guidelines Island provides a DDNS service that assigns names with the "myisland.info" domain. The user may assign a simple host name using this command. For example, if "bobs-island" is specified, the resulting fully-qualified domain name (FQDN) will be "bobs-island.myisland.info". There is no registration or authentication required for this service. Names are available on a first-come, first-served basis. Once a name is assigned to a specific Island, that name may not be assigned to another Island until a grace period has expired or the name is manually deleted using the "no" form of this command from the original Island with an active Internet connection. The A and AAAA records for the FQDN will be updated automatically by the Island based on the public IPv4 and IPv6 addresses on the WAN port. If multiple WAN primary ports are in use (or multiple secondary WAN ports if no primary port is available), the A and AAAA records will be assigned arbitrarily to the IP address on one of the active ports. ## Examples ``` ip ddns bobs-island ``` ## Related Commands {% content-ref url="/pages/05HbqYARN64sJhrHGRIw" %} [ip ddns ipv6](/island-router-cli-2.3.2/commands/ip-global-context/ip-ddns-ipv6.md) {% endcontent-ref %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.islandrouter.com/island-router-cli-2.3.2/commands/ip-global-context/ip-ddns-name.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.