Updated on 2023-03-16 GMT+08:00

Adding an SRV Record Set


To tag a server to show what services it provides, you can add SRV record sets for a domain name.

For details about other record set types, see Record Set Types and Configuration Rules.


  1. Log in to the management console.
  2. Hover the cursor over in the upper left corner. In the service list, choose Networking > Domain Name Service.

    The DNS console is displayed.

  1. In the navigation pane, choose Public Zones or Private Zones.

    The zone list is displayed.

  2. (Optional) If you have selected Private Zones, click on the upper left corner to select the region and project.
  3. Click the domain name.
  4. Click Add Record Set.

    The Add Record Set dialog box is displayed.

  1. Configure the parameters based on Table 1.
    Table 1 Parameters for adding an SRV record set



    Example Value


    Service (for example, FTP, SSH, or SIP) provided over the specified protocol (for example, TCP or UDP) on a host

    The format is _Service name._Protocol.


    _ftp._tcp indicates that the host provides the FTP service over TCP.


    Type of the record set

    If a message is displayed indicating that the record set you are trying to create exists, the record set conflicts with an existing record set.

    For details, see Why Is a Message Indicating Conflict with an Existing Record Set Displayed When I Add a Record Set?

    SRV – Record servers providing specific services


    Resolution line.

    The DNS server will return the IP address of the specified line, depending on where the visitors come from.

    This parameter is supported only for public domain names.

    • Default: returns the default resolution result irrespective of where the visitors come from.
    • ISP: returns the resolution result based on visitors' carrier networks. For details, see Configuring ISP Lines.
    • Region: returns the resolution result based on visitors' geographical locations. For details, see Configuring Region Lines.


    TTL (s)

    Cache duration of the record set on a local DNS server, in seconds.

    The value ranges from 300 to 2147483647, and the default is 300.

    If your service address changes frequently, set TTL to a smaller value.

    Learn more about TTL.

    The default value is 300s, which is, 5 minutes.


    Server address

    You can enter a maximum of 50 record values, each on a separate line.

    The value format is [priority] [weight] [port number] [server address].

    Configuration rules:

    • The priority, weight, and port number range from 0 to 65535.
    • A smaller priority value indicates a higher priority.
    • A larger weight value indicates a larger weight.
    • The server address is the domain name of the target server.

      Ensure that the domain name can be resolved.


    The system checks the priority values first. If the priority values are the same, the system will check the weight values.

    2 1 2355 example_server.test.com


    (Optional) Weight of a record set. The value ranges from 0 to 1000, and the default value is 1.

    This parameter is supported only for public domain names.

    If a resolution line in a zone contains multiple record sets of the same type, you can set different weights to each record set. For details, see Configuring Weighted Routing.



    (Optional) Identifier of the record set. This parameter is displayed when you expand More Settings.

    Each tag contains a key and a value. You can add a maximum of 10 tags to a record set.

    For details about tag key and value requirements, see Table 2.




    (Optional) Supplementary information about the record set.

    You can enter a maximum of 255 characters.


    Table 2 Tag key and value requirements



    Example Value


    • Cannot be left blank.
    • Must be unique for each resource.
    • Can contain a maximum of 36 characters.
    • Cannot start or end with a space or contain special characters =*<>\,|/



    • Cannot be left blank.
    • Can contain a maximum of 43 characters.
    • Cannot start or end with a space or contain special characters =*<>\,|/


  2. Click OK.
  3. Switch back to the Record Sets page.

    View the added record set in the record set list of the zone and ensure that its status is Normal.