DRD Configuration
The DRD is selectable on a per-media basis when the dlpi driver is first loaded into the kernel. By default, the DRD is disabled for all media types. It can be enabled by appending the string ",r" (uses routing) to the argument field in /etc/dlpi.conf.
Once selected, it is used by all physical points of attachment (PPAs) for that media type. The following example configurations both show token ring and FDDI configured, first in a default configuration and then with DRD enabled.
Default configuration:
d+ dlpi tr /dev/dlpi/tr
d+ dlpi fi /dev/dlpi/fi
DRD-enabled configuration:
d+ dlpi tr,r /dev/dlpi/tr
d+ dlpi fi,r /dev/dlpi/fi