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C
OMMAND
L
INE
I
NTERFACE
4-106
Command Usage
• If you enable port security, the switch stops learning new MAC
addresses on the specified port when it has reached a configured
maximum number. Only incoming traffic with source addresses already
stored in the dynamic or static address table will be accepted.
• First use the
port security max-mac-count
command to set the
number of addresses, and then use the
port security
command to
enable security on the port.
• Use the
no port security max-mac-count
command to disable port
security and reset the maximum number of addresses to the default.
• You can also manually add secure addresses with the
mac-address-table static
command.
• A secure port has the following restrictions:
- Cannot use port monitoring.
- Cannot be a multi-VLAN port.
- Cannot be connected to a network interconnection device.
- Cannot be a trunk port.
• If a port is disabled due to a security violation, it must be manually
re-enabled using the
no
shutdown
command.
Example
The following example enables port security for port 5, and sets the
response to a security violation to issue a trap message:
Related Commands
shutdown (4-174)
mac-address-table static (4-199)
show mac-address-table (4-201)
Console(config)#interface ethernet 1/5
Console(config-if)#port security action trap
Summary of Contents for 8708L2
Page 2: ......
Page 24: ...TABLES xxiv ...
Page 28: ...FIGURES xxviii ...
Page 290: ...CONFIGURING THE SWITCH 3 238 ...
Page 584: ...COMMAND LINE INTERFACE 4 294 ...
Page 592: ...TROUBLESHOOTING B 4 ...
Page 605: ......