configure stacking master-capability

configure stacking [node-address node_address | slot slot_number] master-capability [on | off]


The command configures a node to be allowed to operate as either a backup or master, or prevents a node from operating as either.

The command controls the setting on the specified node only. To set the master capability for all nodes on a stack, you can use the command configure stacking redundancy [none | minimal | maximal].

Syntax Description

node_address Specifies the MAC address of a node in the stack. To view the MAC addresses for all nodes in a stack, enter the show stacking command.
slot_number Specifies the slot number of the target active node. To view the slot numbers, enter the show stacking command.


Master-capability is On.

Usage Guidelines

At least one node in the stack topology must be master-capable.

If you attempt to disable the master-capability of the only master capable node in a stack topology, the attempt is denied and following message appears:

Error: At least one node must have Master-capability configured "on".

This command is used to set up master-capability manually. It can also be used to adjust the result achieved when the configure stacking redundancy [none | minimal | maximal] command is used.

The setting takes effect the next time the node reboots. When this command is executed successfully, the following message appears:

This command will take effect at the next reboot of the specified node(s).


To turn on the master capability for a node:

configure stacking node-address 00:04:96:26:6b:ed master-capability on

To turn on the master capability of an active node currently occupying slot 4:

configure stacking slot 4 master-capability on


This command was first available in ExtremeXOS 12.0.

Platform Availability

This command is available with all licenses and platforms that support the SummitStack feature. For information about which licenses and platforms support the SummitStack feature, see the ExtremeXOS 22.2 Feature License Requirements document.