Network services are started from the io-pkt* command, which is responsible for loading in the required .so files.
mount -T io-pkt devn-ne2000.so
For more information, see mount in the Utilities Reference.
Two levels of .so files are started, based on the command-line options given to io-pkt*:
The -d option lets you choose the hardware driver that knows how to talk to a particular card. For example, choosing -d ne2000 will cause io-pkt* to load devn-ne2000.so to access an NE-2000-compatible network card. You may specify additional command-line options after the -d, such as the interrupt vector to be used by the card.
The -p option lets you choose the protocol driver that deals with a particular protocol. As with the -d option, you would specify command-line options after the -p for the driver, such as the IP address for a particular interface.
For more information about network services, see the devn-*, and io-pkt entries in the Utilities Reference.