Cabletron Systems TRMM, Руководство пользователя

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THE DEVICE SETUP MENU
4-14
4.3.3 Exiting the SNMP TRAPS Screen
To exit the SNMP TRAPS screen:
1. Highlight the RETURN option at the bottom of the screen.
2. Press Enter. The DEVICE SETUP menu screen appears.
4.4 THE RING SECURITY SCREEN
The Ring Security screen allows you to control access to the Token Ring
network. When you enable ring security in Alarm Only mode, the
TRMM/TRMMIM stores the MAC address of each station on the token
ring network in a secure database or “allowed list.” Only stations on the
allowed list can enter the ring. The TRMM/TRMMIM can store up to 250
station MAC addresses on the allowed list. The TRMM/TRMMIM retains
the allowed list in its battery-backed Non-Volatile Random Access
Memory (NVRAM). When you power up or reset the TRMM/TRMMIM,
all MAC addresses will be retained and ring security is re-enabled
automatically.
You can append the allowed list by temporarily disabling ring security,
then re-enabling it using the Alarms Only feature. The TRMM/TRMMIM
acts as the Ring Security Monitor for the ring and provides security for the
entire ring.
NOTE: You should enable only one TRMM/TRMMIM per ring for Ring
Security.
You can select two modes of ring security; Alarm Only and
Alarm/Remove. In the Alarm Only mode, new stations can enter the ring,
but a “Station Added” trap/alarm (including the MAC address of the
station) 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.
The Alarm/Remove mode sends a “Remove MAC Frame Command” to
new stations attempting to enter the ring, and a “Station Removed”
trap/alarm (including the MAC address of the station) to the NMS
informing it of the action taken. If, after three attempts, the station cannot