Deployment Guide

● Influence the selection of the stack management units.
CONFIGURATION mode
stack-unit unit-number priority priority-value
The unit with the numerically highest priority is elected the master management unit, and the unit with the second highest
priority is the standby unit.
The range is from 1 to 14.
The default is 0.
Managing Redundancy on a Stack
Use the following commands to manage the redundancy on a stack.
● Reset the current management unit and make the standby unit the new master unit.
EXEC Privilege mode
redundancy force-failover stack-unit
A new standby is elected. When the former stack master comes back online, it becomes a member unit.
● Prevent the stack master 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
You may reset any stack unit except for the master management unit, as shown in the following message.
% Error: Reset of master unit is not allowed.
To rest a unit on a stack, use the following commands.
● Reload a stack-unit.
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 light of the LED status indicator on the front panel of the stack identifies the unit’s role in the stack.
● Off indicates the unit is a stack member.
● The master LED is in OFF state for the standby unit.
● Solid green indicates the unit is the stack master (management unit).
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Stacking