Configuring DNS servers

You can add, remove, and update domain name system (DNS) servers, so that you can use Fully Qualified Domain Name (FQDN) hostnames rather than IP addresses.

Before you begin

About this task

Specifying DNS server information allows you to use Fully Qualified Domain Name (FQDN) hostnames rather than IP addresses for email notifications and AutoSupport. Specifying at least two DNS servers is recommended.
Attention: Provide between two to six IP addresses for DNS servers. It is recommended to select DNS servers that each site can access locally in the event of network islanding. This is to ensure an islanded site continues to have access to the DNS service. After configuring the grid-wide DNS server list, you may further customize the DNS server list for each node. For more information, see "Modifying the DNS configuration for a single node.".

If the DNS server information is omitted or incorrectly configured, a DNST alarm is triggered on each grid node’s SSM service. The alarm clears when DNS is configured correctly and the new server information has reached all grid nodes.

Steps

  1. Select Maintenance > DNS Servers.
  2. In the Servers section, add update, or remove DNS server entries, as necessary.
    The best practice is to specify at least two DNS servers per site. You can specify up to six DNS servers.
  3. Click Save.