In this section:
The SBC Edge can be configured to use a Primary DNS Server, a Secondary DNS Server, and a Domain Specific DNS Server (Split-DNS) to resolve FQDNs.
The Primary and Secondary DNS servers are configured in the Node Level Settings. For more information, see Configuring Host Information and DNS.
A Domain Specific DNS Server is configured through the Split-DNS settings. The following section describes how to configure the Split-DNS.
The Split-DNS can also be configured using DHCP on the Logical Interface. For more information, see Configuring and Modifying Logical Interfaces .
To create a Split-DNS entry:
In the left navigation page, go to Protocols > DNS > Split-DNS. An IPv4 example is shown below; the DNS Server IP can be configured with IPv4 or IPv6.
Click the Create Split DNS List Entry (
) icon at the top of the Split DNS page.Create Split DNS List Entry
In Domain Name, enter the domain name for the specific domain.
Click OK.
The entry now appears in the Split DNS table.
A DNS server may be associated with many domain names. One entry should be configured for each DNS server and domain combination.
When a domain-specific DNS server fails, it fails over to the next domain-specific DNS server associated with that domain. Global DNS servers are not used for a domain, even if all of the configured domain-specific DNS servers fail.
One entry should be configured for each domain and DNS server combination.