Trunk ports can be enabled/disabled using the following command:
SET TRUNK {slot} RING_IN.n MODE {enable|disable} or
SET TRUNK {slot} RING_OUT.n MODE {enable|disable}
7. Enable/disable ports.
Each port can be enabled/disabled using the following command:
SET PORT {slot.port} mode {enable|disable}
Chapter 9. 8260 Token-Ring Modules 189