Adding an NS Record Set

Scenarios

If you want to specify authoritative DNS servers for a domain name, you can add NS record sets.

For more details, see Record Set Types and Configuration Rules.

Constraints

• You can create NS record sets only in public zones.
• After a public zone is created, an NS record set is automatically created for this zone and cannot be deleted. You can add NS record sets only in the following scenarios:
  • The Name parameter is not left blank. This means that you can add NS record sets for subdomains of a domain name.
  • The value of the Line parameter is not set to Default. This means that you can add NS record sets for the domain name with other resolution lines.

Procedure

1. Log in to the management console.
2. In the service list, choose Network > Domain Name Service.

   The DNS console is displayed.

3. In the navigation pane on the left, choose Public Zones.

   The Public Zones page is displayed.

4. Click the domain name.
5. Click Add Record Set.

   The Add Record Set dialog box is displayed.

6. Configure the parameters based on Table 1.

   Table 1 Parameters for adding an NS record set

   Parameter	Description	Example Value
   Name	Prefix of the domain name to be resolved. For example, if the domain name is example.com, the prefix can be as follows: www: The domain name is www.example.com, which is usually used for a website. Left blank: The domain name is example.com. The Name field cannot be set to an at sign (@). Just leave it blank. abc: The domain name is abc.example.com, a subdomain of example.com. mail: The domain name is mail.example.com, which is typically used for email servers. *: The domain name is *.example.com, which is a wildcard domain name, indicating all subdomains of example.com.	abc
   Type	Type of the record set A message may be displayed indicating that the record set you are trying to add conflicts with an existing record set.	NS – Delegate subdomains to other name servers
   TTL (s)	Cache duration of the record set on a local DNS server, in seconds. The value ranges from 1 to 2147483647, and the default is 300. If your service address changes frequently, set TTL to a smaller value.	300
   Value	DNS server address You can enter a maximum of 50 record values, each on a separate line.	ns1.example.net ns2.example.net
   Tag	(Optional) Identifier of a record set. Each tag contains a key and a value. You can add a maximum of 20 tags to a record set. For details about tag key and value requirements, see Table 2.	example_key1 example_value1
   Description	(Optional) Supplementary information about the record set. You can enter a maximum of 255 characters.	-

   Table 2 Tag key and value requirements

   Parameter	Requirements	Example Value
   Key	Cannot be left blank. Must be unique for each resource. Can contain a maximum of 36 characters. Can contain only letters, digits, hyphens (-), at signs (@), and underscores (_).	example_key1
   Value	Cannot be left blank. Can contain a maximum of 43 characters. Can contain only letters, digits, hyphens (-), at signs (@), and underscores (_).	example_value1

7. Switch back to the Record Sets tab.

   The added record set is in the Normal state.