What is a banner message and how do you configure one?

A login warning to deter unauthorized access; set it with banner motd #message#, where # is a delimiting character that marks the start and end of the text.

A banner message warns unauthorized users that access is prohibited and may have legal implications.

Configure a Message of the Day (MOTD) banner:

Switch(config)# banner motd #Authorized Access Only!#

Key points:

• The # character is the delimiting character (can be any character not in the message)
• The delimiter marks the beginning and end of the message
• The banner displays before the login prompt
• Important for legal notice in case of unauthorized access attempts