Cisco Systems RJ-45-to-AUX manual Displaying the MAC Address Table

———— —————————— ——————————			——————————	——————————		————————
3/3	0	0	0		0		0
Port Single−Col Multi−Coll			Late−Coll Excess−Col		Carri−Sen		Runts Giants
———— —————————— ——————————			———————— ——————————		————————		————	——————
3/3	0	0	0	0		0	0	0

Last−Time−Cleared

——————————————————————————

Fri Dec 22 2000, 19:53:38

To enable static port security for module 1 port 3, manually specify the secure MAC address of the attached interface 00−15−20−4c−78−a1 using the following command:

CAT5K> (enable) set port security 3/1 enable 00−15−20−4c−78−a1 Port 3/1 port security enabled with 00−15−20−4c−78−a1

as the secure mac address CAT5K> (enable)

On a Cisco IOS command−based switch, you can use the port secure interface configuration command to enable addressing security. In Interface Configuration mode, to assign a port to allow only one MAC address, use the following command:

2924XL(config−if)# port secure max−mac−count 1

Tip You can assign max−mac−count a value between 1 and 132.

Displaying the MAC Address Table

Use the show mac−address−table command from Privileged EXEC Mode to display the MAC address table. Here is the command and syntax placement—Table 13.5 contains a description of each syntax element:

Table 13.5: The show mac−address−table command’s optional syntax descriptions.

Syntax	Description
static	Displays the static addresses
dynamic	Displays the dynamic addresses
secure	Displays the secure addresses
self	Displays addresses added by the switch itself
aging−time	Displays aging−time for dynamic addresses for all VLANs
count	Displays a count for different kinds of MAC addresses
address	Displays information for a specific MAC address
hw−addr	Displays information for the given MAC address
interface	Displays addresses for the specific port
atm	Adds dynamic addresses to an ATM module slot/port
slot	Associates the dynamic address with a slot (1 or 2) port
port	Adds dynamic addresses to a port (the port number is always 0 for ATM
	interfaces)
vlan	Displays addresses for a specified VLAN
vlan−id	Displays addresses for the VLAN

show mac−address−table [staticdynamicsecureself aging−timecount]

[address hw−addr] [interface interface] [atm slot/port][vlan vlan−id]

The output from the show mac−address−table command should look like the following:

270