HP ProCurve Switch 212M Management And Configuration Manual page 59

Rebooting To Activate Configuration Changes. Configuration changes
for some parameters become effective as soon as you save them. However,
you must reboot the switch in order to implement any changes to the param-
eters on the Console/Serial Link screen (under Switch Management Access
Configuration menu).
If configuration changes requiring a reboot have been made, the switch
displays an asterisk next to the menu item in which the change has been made.
For example, if you change and save parameter values for the switch's
Console/Serial Link configuration, the need for rebooting the switch would be
indicated by an asterisk appearing next to the item Console/Serial Link in the
Switch Management Access Configuration menu, and in the Main menu as
shown in figure 4-6:
Asterisk indicates a
configuration change
that requires a reboot
in order to take effect
Reminder to reboot the
switch to activate
configuration changes
Figure 4-6. Example of a Configuration Change Requiring a Reboot
Using the Switch Console
Rebooting the Switch
4-13