Administrator Guide

• 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
EXEC PRIVILEGE
When the reload completes, the base-module ports comes up in 4x10GbE (quad) mode. The switch functions in standalone mode
but retains the running and startup conguration that was last synchronized by the master switch while it operated as a stack unit.
Conguring the Uplink Speed of Interfaces as 40 Gigabit Ethernet
You can congure the I/O Aggregator switch in standalone, VLT, and stack modes to operate with an uplink speed of 40 Gigabit
Ethernet per second. You can use the chassis management controller (CMC) interface to access the switch and specify the 40 GbE
QSFP+ module ports to function in 40 GbE mode after the subsequent reload operation. By default, these QSFP+ modules function
in 10GbE mode.
When you congure the native mode to be 40 GbE, the CMC sends a notication to the Aggregator to set the default internal
working of all of the ports to be 40 GbE after the switch reloads. After you set this conguration, you must enter the
reboot
command (not pressing the Reset button, which causes the factory default settings to be applied when the device comes up online)
from the CMC for the uplink speed to be eective.
This functionality to set the uplink speed is available from the CLI or the CMC interface when the Aggregator functions as a simple
MUX or a VLT node, with all of the uplink interfaces congured to be member links in the same LAG bundle. You cannot congure
the uplink speed to be set as 40 GbE if the Aggregator functions in programmable MUX mode with multiple uplink LAG interfaces or
192
Stacking