configure stacking slot-number automatic

configure stacking slot-number automatic


Configures a slot number on all nodes in the stack topology, selecting the number automatically.

Syntax Description


Configures slot numbers on every node in the stack, selecting the number automatically. If there are more than eight nodes in the stack topology, the assignment is only performed on the first eight nodes.

Automatic slot number assignment causes assignment of slot numbers starting from 1 and increasing up to 8. The nodes in the stack topology are assigned the numbers in the order in which they would appear currently in the show stacking command output. In a ring, slot number 1 is assigned to the current node, slot number 2 is assigned to the node connected to the current node's stack port 2, and so forth. In a daisy chain, slot 1 is assigned to the node at the end of the chain that begins with the node connected to the current node's stack port 1.


The default slot-number for a node in stacking mode is 1.

Usage Guidelines

The configuration is stored on the affected node(s) immediately but does not take effect until the next reboot of the node(s). The configuration applies only when the node is running in stacking mode. To see the configured and active slot numbers of all nodes, use the show stacking configuration command.

To see the resulting slot number assignment, run the show stacking configuration command.



Failure to configure a node does not prevent configuration of the slot numbers on the other nodes, and does not affect the slot number assigned to each node.

If you enter the command with the automatic option, the following confirmation message appears:

Reassignment of slot numbers may make the stack incompatible with the current configuration file. Do you wish to continue? (y/n)

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 configure all slot-numbers for a stack:

configure stacking slot-number automatic


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 and Switch Engine 31.7 Feature License Requirements document.