Reference Guide

• 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 11). A
configuration mismatch between the newly added unit and a logically provisioned unit occurs if the
logical provisioning for the unit number and the added unit have different stack groups configured. In
this case, the stack-group configuration on the new unit takes precedence over the logical
provisioning.
Converting Four 10 GbE Ports to 40 GbE Ports for
Stacking
Stacking is not supported on fixed 40 GbE ports operating in 4x10G (quad) mode.
1. Convert a 4x10GbE port to 40GbE mode.
CONFIGURATION mode
no stack-unit unit-number port port-number portmode quad
stack-unit number is the ID number of the stack unit. The valid values are from 0 to 11.
2. Save the port configuration.
EXEC Privilege mode
write memory
3. Reload the stack for the port reconfiguration to take effect.
EXEC Privilege mode
reload
To display the stack-unit number, use the show system brief command.
Removing a Stack Group from Stacking Mode
To remove a stack group of four 10 GbE ports or one 40 GbE port from the stack, use the no form of the
stack-unit unit-number stack-group number command.
After entering the command, save the configuration and if necessary, re-attach the cables to ports in a
different stack group that has been enabled for stacking. Then reload the stack for the change to take
effect.
1. Remove a stacking port from a stack.
CONFIGURATION mode
no stack-unit unit-number stack-group group
2. Save the port configuration.
EXEC Privilege mode
write memory
3. Reload the stack for the port reconfiguration to take effect.
EXEC Privilege mode
reload
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Stacking