Enabling or disabling stacking mode

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. 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

To see the configuration of the stack at any time, enter the show running-config command. Refer to Displaying running configuration information for details.

Disabling stacking mode

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 in device configuration mode.

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# configure terminal
device(config)# stack disable

To restore the capability of the device to send and receive stacking probe messages, enter the no stack disable command in device configuration mode.