LOCAL MANAGEMENTPage 5-175.3.4 The Ring Security ScreenThe Ring Security screen lets you control access to your token ringnetwork. Figure 5-8 shows the Ring Security screen. When you enablering security, the TRXI stores the MAC address of each station on thetoken ring network in a secure database or “allowed list.” Onlystations on the allowed list can enter the ring. The TRXI can store upto 250 station MAC addresses on the allowed list. The TRXI retainsthe allowed list in its battery-backed Non-Volatile Random AccessMemory (NVRAM). If you power up or reset the TRXI, NVRAMretains the allowed list and automatically re-enables ring security.Figure 5-8. Ring Security ScreenYou can append the allowed list by temporarily disabling ring security,then re-enabling it using the Alarms Only feature. The TRXI acts asthe Ring Security Monitor for the ring and provides security for theentire ring.Note: You should enable the Ring Security feature on only one TRXIper token ring.You can select two modes of ring security; Alarm Only andAlarm/Remove. In the Alarm Only mode, new stations can enter thering, but a “station added” trap/alarm notifies the NetworkManagement Station (NMS) of the event.TRXI LOCAL MANAGEMENT Flash Image Version: X.XX.XXRING SECURITYSTATION ADDRESS00-00-00-00-00-00Stn Edit [00-00-00-00-00-00] [Add] Security Mode [Disabled]SAVE/EXECUTE NEXT_SCREEN PREVIOUS_SCREEN RETURN