Ethernet SNMP Module Installation and Reference Guide ( J2603B) 1995-10

flash. An alarm is also sent to the authorized network management
station(s) if the Send Alarm parameter is set to YES.
Port Security Off—disables port security. This is a convenient
way to remove the port security. It automatically sets the Send Alarm
and Eavesdrop Prevention parameters to OFF (and therefore, the
Disable Port parameter will also be OFF).
Send Alarm when intruder detected: Configures the hub to send an
alarm (SNMP trap) to a network management station whenever an
unauthorized address (an intruder) is detected on the port. Note that for the
alarm to actually be sent, you must have first used the Managers
command to configure one or more network managers to receive alarms.
See the Managers command description earlier in this chapter.
Eavesdrop prevention: Configures the hub to prevent the port from
hearing data that is intended for another port. Only the data packets that
have a destination address that matches the port’s authorized address are
sent to the port. If Eavesdrop Prevention is not enabled on all ports, the hub
functions like a repeater and every packet seen by the hub is forwarded to
the non-Eavesdrop Prevention ports. See appendix C, “Security
Information”, for a detailed description of this feature.
Configuring Security on a Single Port
To set or change the security configuration for a single port on the hub
(twisted-pair, ThinLAN, or Xcvr), enter
SE and the port’s ID; for example,
SE A4. The port’s current security configuration is displayed, followed by a
prompt to change the configuration or not.
If you choose to change the configuration, you are then prompted for the
following parameters (defined on the previous page):
Address selection method, or authorized station address
You are first prompted if you want to change the address selection
method or the authorized address. Press [Return] or enter N to retain
the current value. Enter Y to change the value and you are prompted
to select one of the following methods:
–
use First address heard (enter F)
–
learn address Continuously
(enter C)
–
Assign an address (enter A)
–
port security Off (enter O)
Send alarm when intruder detected
Eavesdrop prevention
Extended Hub
Capabilities
Extended Hub Capabilities
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