Can CDRouter be configured to use only one DNS server in PPPoE mode?

By default, CDRouter includes PPP IPCP options for a primary and backup DNS server. If the device under test (DUT) does not support a backup DNS server, you can configure CDRouter’s backup DNS server to If the backup DNS server is, CDRouter will not include a backup DNS server during IPCP negotiation. To set the backup DNS server to, make the following change to the CDRouter configuration file:

testvar wanBackupDnsServer