To remove a token-ring network adapter from the system, first ensure that there is no user on the system, and then perform the following steps:
# ifconfig tr0 detach #
# rmdev -l tr0 -d tr0 deleted #
# rmdev -l tok0 -d tok0 deleted #
If you do not physically remove the network adapter before powering on the system, the cfgmgr program will detect the network adapter during the system boot, unless it is an ISA adapter, and redefine the device tok0 in the Customized Devices object database.