Adding a CNAME Record Set

Scenarios

If you want to map one domain name to another, add a CNAME record set for the domain name.

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

Constraints

• You can leave the Name parameter blank when adding a CNAME record set.
• You cannot create a CNAME record set with the same name and resolution line as an NS record set.

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 or Private Zones.

   The zone list is displayed.

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

   The Add Record Set dialog box is displayed.

7. Configure the parameters based on Table 1.

   Table 1 Parameters for adding a CNAME 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.	Left blank
   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.	CNAME – Map one domain to another
   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	Domain name alias. You can enter only one domain name.	webserver01.example.com
   Weight	(Optional) Weight of a record set. The value ranges from 0 to 1000, and the default value is 1. This parameter is only designated 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.	1
   Description	(Optional) Supplementary information about the record set. You can enter a maximum of 255 characters.	-

8. Click OK.
9. Switch back to the Record Sets tab.

   You can view the added record set in the Normal state.