Nortel Networks 1000BASE-LX User Manual

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Chapter 1 BayStack 420 Switch
209418-A
The response can be to send a trap, turn on destination address (DA) filtering, 
disable the specific port, or any combination of these three options.
The MAC address-based security feature is based on Nortel Networks BaySecure 
LAN Access for Ethernet, a real-time security system that safeguards Ethernet 
networks from unauthorized surveillance and intrusion.
For instructions to use the console interface (CI) to set up the RADIUS-based 
security feature, see 
Flash memory storage
Switch software image storage
The BayStack 420 Switch uses flash memory to store the switch software image. 
The flash memory allows you to update the software image with a newer version 
without changing the switch hardware (see 
). An in-band connection between the switch and the TFTP load host is 
required to download the software image.
Configuration parameters storage
All configuration parameters are stored in flash memory. These parameters are 
updated every 10 seconds (if a change occurs) or whenever a reset command is 
executed.
Warning: Do not power off the switch within 10 seconds of changing 
any configuration parameters. Powering down the switch within 10 
seconds of changing configuration parameters can cause the changed 
configuration parameters to be lost.