Cisco Systems 3750E manual Managing the MAC Address Table, Configuring a Login Banner

Chapter 7 Administering the Switch

Managing the MAC Address Table

Configuring a Login Banner

You can configure a login banner to be displayed on all connected terminals. This banner appears after the MOTD banner and before the login prompt.

Beginning in privileged EXEC mode, follow these steps to configure a login banner:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	banner login c message c	Specify the login message.
		For c, enter the delimiting character of your choice, for example, a pound
		sign (#), and press the Return key. The delimiting character signifies the
		beginning and end of the banner text. Characters after the ending delimiter
		are discarded.
		For message, enter a login message up to 255 characters. You cannot use the
		delimiting character in the message.
Step 3
	end	Return to privileged EXEC mode.
Step 4
	show running-config	Verify your entries.
Step 5
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To delete the login banner, use the no banner login global configuration command.

This example shows how to configure a login banner for the switch by using the dollar sign ($) symbol as the beginning and ending delimiter:

Switch(config)# banner login $

Access for authorized users only. Please enter your username and password.

$

Switch(config)#

Managing the MAC Address Table

The MAC address table contains address information that the switch uses to forward traffic between ports. All MAC addresses in the address table are associated with one or more ports. The address table includes these types of addresses:

•Dynamic address: a source MAC address that the switch learns and then ages when it is not in use.

•Static address: a manually entered unicast address that does not age and that is not lost when the switch resets.

The address table lists the destination MAC address, the associated VLAN ID, and port number associated with the address and the type (static or dynamic).

Note For complete syntax and usage information for the commands used in this section, see the command reference for this release.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-02 7-19