Security
Figure 7-3. The Addresses Window
3.On the left side of the window, the Learned Addresses list box will display all source addresses detected by the selected port during the last aging interval (see Chapter 6, Source Address, for more information on the aging interval). On the right side of the window, the Secure Addresses list box will display the source addresses which have been secured for that port. Remember, as long as the port is in a securable state, the first two addresses detected by the port are automatically secured; you can add additional addresses, or delete the default addresses and secure new ones, as follows:
a.To add a learned address, click to highlight the desired address in the
Learned Addresses list box, then click on 
. A confirmation window will appear; click on Yes to secure the selected address.
NOTE |
If security has never been enabled, new addresses will replace any existing learned addresses. If security has ever been enabled — even if it is not currently enabled — new addresses will be stored in addition to any learned addresses.
b.To delete a secured address, click in the Secure Addresses list box to
highlight the address you wish to delete, then click on 
. A confirmation window will appear; click onYes to delete the address, or No to leave the address secured.
c.To add an address not yet detected by the port, make sure no Learned
Addresses are highlighted, then click on 
; the Add MAC Address window, Figure
Configuring Security |