Reference Guide

A new standby is elected. When the previous stack master comes back online, it becomes a member
unit.
• Prevent the stack master or stack unit from rebooting after a failover.
CONFIGURATION mode
redundancy disable-auto-reboot stack-unit
This command does not affect a forced failover, manual reset, or a stack-link disconnect.
• Display redundancy information.
EXEC Privilege mode
show redundancy
Resetting a Unit on a Stack
To reload any of the member units or the standby in a stack, use the following commands.
If you try to reset the stack master, an error message displays: Reset of master unit is not
allowed
.
• Reload a stack unit from the master switch.
EXEC Privilege mode
reset stack-unit unit-number
• Reload a member unit from the unit itself.
EXEC Privilege mode
reset-self
• Reset a stack-unit when the unit is in a problem state.
EXEC Privilege mode
reset stack-unit unit-number hard
Verify a Stack Configuration
The following lists the status of a stacked switch (master, standby master, or member unit) according to
the color of the System Status LED on its front panel.
Color Meaning
Green The switch is online and operating as a master, standby, or member unit in a stack
or as a standalone unit.
Blinking Green The switch is booting up.
Amber A failure condition in switch operation has occurred.
904
Stacking