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Configuring intrusion protection
Intrusion protection enables a device to take one of the following actions in response to illegal
frames:
•
blockmac
—Adds the source MAC addresses of illegal frames to the blocked MAC address list
and discards the frames. All subsequent frames sourced from a blocked MAC address are
dropped. A blocked MAC address is restored to normal state after being blocked for 3 minutes.
The interval is fixed and cannot be changed.
•
disableport
—Disables the port until you bring it up manually.
•
disableport-temporarily
—Disables the port for a period of time. The period can be configured
with the
port-security timer disableport
command.
To configure the intrusion protection feature:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Configure the intrusion
protection feature.
port-security intrusion-mode
{
blockmac
|
disableport
|
disableport-temporarily
}
By default, intrusion protection is
disabled.
4.
Return to system view.
quit
N/A
5.
(Optional.) Set the silence
timeout period during which
a port remains disabled.
port-security timer
disableport
time-value
By default, the port silence
timeout is 20 seconds.
NOTE:
On a port operating in either macAddressElseUserLoginSecure mode or
macAddressElseUserLoginSecureExt mode, intrusion protection is triggered only after both MAC
authentication and 802.1X authentication fail for the same frame.
Configuring secure MAC addresses
Secure MAC addresses are configured or learned in autoLearn mode. If the secure MAC addresses
are saved, they can survive a device reboot. You can bind a secure MAC address only to one port in
a VLAN.
Secure MAC addresses include static, sticky, and dynamic secure MAC addresses.
Table 18 Comparison of static, sticky, and dynamic secure MAC addresses
Type
Address sources
Aging mechanism
Can be saved and
survive a device
reboot?
Static
Manually added (by using
the
port-security
mac-address
security
command without the
sticky
keyword).
Not available.
The static secure MAC addresses
never age out unless you perform any
of the following tasks:
•
Manually remove these MAC
addresses.
•
Change the port security mode.
•
Disable the port security feature.
Yes.
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