Cabletron Systems MMAC-Plus 9T125-08 Reference Manual page 22

9T125-08 Module Specific Information
Token Ring Secured Station Configuration
The Token Ring Secured Station Configuration Screen (Figure 7), allows you to
control access to the module's token ring network.
The Disabled mode (by default) allows all new stations to enter the ring.
When ring security is enabled in Alarm Only mode, the module stores the MAC
address of each station on the token ring network in a secure database or
"allowed list." The module can store up to 250 station MAC addresses on the
allowed list. The module retains the allowed list in its battery-backed Non-
Volatile Random Access Memory (NVRAM). When the module is powered up or
reset, all MAC addresses are retained and ring security is reenabled automatically.
The Alarm Only mode allows new stations to enter the ring, but a "station added"
trap/alarm notifies the Network Management Station (NMS) of the event. The
trap/alarm includes the new station's MAC address so that the network manager
can decide if the new station should be allowed on the ring.
Do not enter Remove/Alarm mode without first entering the Alarm Only mode
or adding nodes to the allowed list. All nodes not appearing in the list, currently
!
active on the ring, WILL BE REMOVED!
CAUTION
The Remove/Alarm mode sends a "Remove Station MAC Frame Command" to
new stations attempting to enter the ring, and a trap/alarm to the NMS informing
it of the action taken. If, after three attempts, the station (outside the hub) cannot
be removed from the ring, a trap/alarm is sent to the NMS informing it that "the
station could not be removed." Also, the port is disabled for the station directly
connected to the hub and a trap/alarm is sent indicating port removal.
To access the Token Ring Secured Station Configuration Screen from the Module
Specific Configuration Menu:
1. Use the arrow keys to highlight the Token Ring Security option.
2. Press the Enter key.
The Token Ring Secured Station Configuration Screen (Figure 7), appears.
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