This option specifies the network interface CDRouter will use as its primary WAN test interface. This interface should be physically connected to the DUT’s WAN interface or to a termination device that is connected to the DUT, such as a DSLAM or a CMTS. Any test Ethernet interface that is installed on the CDRouter system may be used. It is also possible to use a CDRouter’s wifi interface in cases where the DUT’s WAN interface is also wifi, such as an AP.
Note that all network interfaces used by CDRouter must not be managed by the underlying operating system. CDRouter will automatically configure the IP addresses of all test interfaces based on the configuration options specified here.