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4-104 Sun Fire B1600 Blade System Chassis Switch Administration Guide • June 2003
Command Mode
Interface Configuration (Ethernet)
Command Usage
■ If you enable port security, the switch stops dynamically learning new
addresses on the specified port. Only incoming traffic with source addresses
already stored in the dynamic or static address table are accepted.
■ To use port security, first allow the switch to dynamically learn the <source
MAC address, VLAN> pair for frames received on a port for an initial training
period, and then enable port security to stop address learning. Be sure you
enable the learning function long enough to ensure that all valid VLAN
members have been registered on the selected port.
■ To add new VLAN members at a later time, you can manually add secure
addresses with the mac-address-table static command, or turn off port
security to reenable the learning function long enough for new VLAN members
to be registered. Learning may then be disabled again, if desired, for security.
■ 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.
Example
The following example enables port security of port SNP5:
Related Commands
mac-address-table static (4-99)
show mac-address-table (4-100)
Console(config)#interface ethernet SNP5
Console(config-if)#port security