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, the system automatically adds an NS record set for the domain name. This NS record set cannot be modified or deleted. Therefore, 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, choose Public Zones.

   The Public Zones page is displayed.

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

   The Add Record Set dialog box is displayed.

6. Set required 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 zone name is example.com, the domain name 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. In some cases, you may need to set the record set name to the at sign (@). However, the at sign is not supported. Leave the Name 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 an email server. *: 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 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.	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.	The default value is 300, which is, 5 minutes.
   Value	DNS server address You can enter a maximum of 50 record values, each on a separate line.	ns1.example.net ns2.example.net
   Tags	(Optional) Identifier of a resource Each tag contains a key and a value. You can add a maximum of 20 tags to a record set. This parameter is displayed when you enable Other Settings. 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.	example_key1
   Value	Cannot be left blank. Can contain a maximum of 43 characters.	example_value1

7. Switch back to the Record Sets page.

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