Administrator Guide

The default is 0.
To revert the management priority of a stack unit to the default value of 0, use the no form of the stack-unit unit-number
priority number command.
After you recongure the priorities of stacked switches, reload the stack so that a new master and standby election is performed.
Renumbering a Stack Unit
To renumber a stack unit to reset the unit numbering for a master, standby or member unit, use the following command.
• If you renumber the master switch, you are prompted to reload the entire stack.
• If you renumber the standby switch, only the switch reloads and is replaced by a member switch that is elected as the new
standby.
• If you renumber a member switch, only the member switch reloads.
• If you renumber a switch to a number already assigned to another stack unit, the following error message displays:
Dell#stack-unit 5 renumber 0
% ERROR: stack unit 0 already exists.
Assign a stack-number to a unit.
EXEC Privilege mode
stack-unit unit-number renumber new-number
Provisioning a Stack Unit
You can logically provision a stack-unit number to accept only an MXL 10/40GbE switch.
Provisioning is a type of pre-conguration that is stored on the master switch and applied when a stacked unit is assigned the unit
number.
When you provision a unit number for an MXL 10/40GbE switch:
• The base-module ports on the switch (ports 33 and 37/stack groups 0 and 1) are pre-congured for 40GbE operation.
• The 40GbE ports on FlexIO modules (ports 41 and 45 in slot 0; ports 49 and 53 in slot 1) are pre-congured for 4x10GbE (quad
mode) operation.
Create a virtual stack unit by logically provisioning a switch.
CONFIGURATION mode
stack-unit unit-number provision MXL-10/40GbE
To provision a stack unit, use the stack-unit provision command in Global Conguration mode, save the provisioning
conguration, and reload the stack.
Dell Networking OS Behavior: Stacking conguration is handled as follows on an MXL 10/40GbE switch:
• If a stack unit goes down and is removed from the stack, the logical provisioning congured for the stack-unit number is saved
on the master and standby switches.
• When you add a new unit to the stack and the stack already has an existing member unit with the same stack-unit number, the
new unit is assigned the smallest available unit number (from 0 to 5). A conguration mismatch between the newly added unit
and a logically provisioned unit occurs in the following situations:
– The logical provisioning for the unit number congures FlexIO module ports for 4x10GbE operation and the added unit has
FlexIO Module ports operating in 40GbE mode.
– The logical provisioning for the unit number and the added unit have dierent stack groups congured.
• When a conguration mismatch occurs, the newly added switch enters into a Card-Problem state and is disabled. A syslog error
message generates. To restore a stacked switch in a Card-Problem state, refer to Failure Scenarios.
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Stacking