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Advanced Management
Page 4-16
K Note: The three security levels are mutually exclusive; a
port can have either security level1, level2, or level 3, but
never a combination of security levels.
To configure security level 2 or 3, you must specify the port-trusted MAC
address. You can either specify the address directly, or direct the system to
trust the address of the first station that addresses the port. By trusting the
first station to address the port, you can configure port security before you
know which system will ultimately use that port.
When security level 2 (port lock) is enabled and an intruder attempts to
direct traffic to the port, the port is immediately disabled. The port is then re-
enabled only by clearing the security level by management.
When security level 3 (intruder lock) is enabled and an intruder attempts to
direct traffic to the port, the switch locks out the intruder’s MAC address; it
will not accept any traffic from that station. The intruder’s address is then re-
enabled only by clearing the security level by management.
I Important: If you set security level 2 or 3, you should
also set the Intruder Trap. If you do not set this trap, you
will not receive notification that the port has been dis-
abled. See “Setting the Intruder Trap.”
By default, security levels 2 and 3 are both disabled.
Configuring Security Level 2 or Level 3
To set security level 2 (port lock) or level 3 (intruder lock) on a port:
1 From the Configuration Menu, type t to access the Secu-
rity Management Menu.
2 Type p to access the Port Security Configuration Menu,
as shown in Figure 4-5.
3 Use the commands at the bottom of the menu to navigate
to the port you want to want to configure.
4 Select u to Set/Clear port security.
5 Type s to set security.
6 Type 2 to select Port Security with Port Lock, or 3 to
select Port Security with Intruder Lock.
7 Type 1 to have the system trust the first station that
addresses this port, or type 2 to enter a specific port-