When a unit is stack-enabled or joins a stack either actively or passively, it reserves priority queue 7 for
stacking traffic control, assigns buffers for the stacking ports, and configures the first two 10 Gbps ports
as stacking ports.

NOTE
Designated stacking ports cannot contain any configuration information, such as VLAN membership,
and so on. If configuration information exists, stack enable will fail. You must remove all configuration
information from the port and re-issue the stack enable command.

To enable stacking mode on a new unit before you add it to the stack, enter the following command.

device(config)# stack enable

Enable stacking. This unit actively participates in stacking

Syntax: [no] stack enable

To see the configuration of the stack at any time, enter the show running-config command.

To remove stacking capability, enter the no stack enable command. This prevents the unit from
actively sending out probe messages, however the unit could still be called to join a stack by an active
controller. To prevent this, enter the stack disable command.

The stack disable command prevents a unit from sending or listening for any stacking probe
messages. In this mode, the unit cannot be forced to join a stack.

device(config)# stack disable

Syntax: [no] stack disable

To remove this restriction, enter the no stack disable command.

Important notes about stacking images

Consider the notes in this section when upgrading from a pre-stacking release to a stacking release, or
when reverting from a stacking release to a pre-stacking release.

Refer to the release notes for instructions about upgrading the software.

Enabling the stacking mode

FastIron Ethernet Switch Stacking Configuration Guide

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