Nortel Networks 1000ASE-XD - Manual (Page 38)

38 Chapter 1 BayStack 420 Switch
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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
Chapter 3, “Using the console interface,” on page 87 .
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
“Software Download screen” on
page 166 ). 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.