Concept Guide

stack-unit 0 iom-mode
stack
5 Reload the switch. Dell Operating System automatically assigns a number to the new unit and adds it as member switch in the stack.
The new unit synchronizes its running and startup congurations with the stack.
EXEC Privilege mode
reload
If an Aggregator is already congured to operate in stacking mode, simply attach QSFP or direct attach cables to connect 40GbE ports on
the base module of each stacked Aggregator. The new unit synchronizes its running and startup congurations with the stack.
Dell Networking OS Behavior: When you add a new Aggregator to a stack:
• If the new unit has been congured with a stack number that is already assigned to a stack member, the stack avoids a numbering
conict by assigning the new switch the rst available stack number.
• If the stack has been provisioned for the stack number that is assigned to the new unit, the pre-congured provisioning must match
the switch type. If there is a conict between the provisioned switch type and the new unit, a mismatch error message is displayed.
Resetting a Unit on a Stack
Use the following reset commands to reload any of the member units or the standby in a stack. If you try to reset the stack master, the
following error message is displayed:
% Error: Reset of master unit is not allowed.
To rest a unit on a stack, use the following commands:
• Reload a stack-unit from the master switch.
EXEC Privilege mode
reset stack-unit unit-number
• Reset a stack-unit when the unit is in a problem state.
EXEC Privilege mode
reset stack-unitunit-number {hard}
Removing an Aggregator from a Stack and Restoring Quad
Mode
To remove an Aggregator from a stack and return the 40GbE stacking ports to 4x10GbE quad mode follow the below steps:
1 Disconnect the stacking cables from the unit. The unit can be powered on or o and can be online or oine.
2 Log on to the CLI and enter Global Conguration mode.
Login: username
Password: *****
Dell> enable
Dell# configure
3 Congure the Aggregator to operate in standalone mode.
stack-unit 0 iom-mode standalone
CONFIGURATION
4 Log on to the CLI and reboot each switch, one after another, in as short a time as possible.
reload
Stacking
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