The command to configure a banner that is displayed when connecting to a switch is typically: For Cisco devices:
banner motd $ Your banner message here $
This configures the Message of the Day (MOTD) banner that appears before the
login prompt on a switch. The $ acts as a delimiter for the start and end of
the banner message, but any single character can be used as a delimiter. For
other switches, such as those running ExtremeXOS, the command may be:
configure banner before-login save-to-configuration
This command sets a login banner that appears before login, and you type in the banner text after running the command. Summary of typical Cisco syntax:
- Enter global configuration mode:
configure terminal - Set the banner:
banner motd <delimiter> Your message <delimiter> - Exit and save configuration if desired.
For example:
Switch(config)# banner motd $Keep out! Unauthorized access prohibited.$
This banner will be displayed when connecting to the switch before login. If
using Dell EMC OS10 switches or others, a similar approach with banner login
or banner motd is used. References:
- Cisco banner motd command usage
- Extreme Networks configure banner syntax
- Dell OS10 banner example
