Configuration Guide User guide

312 FastIron Configuration Guide
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Brocade IronStack management
Removing a unit from an IronStack
To remove a unit from the stack, disconnect the cables from the stacking ports. This can be done
whether the units are powered-on or powered-off. When you remove a unit that is powered-on, it is
still in stacking enabled mode. To remove the stacking files, enter the stack unconfigure me or
stack unconfigure clean command. When the unit reboots, it will operate as a standalone unit.
Refer to “Unconfiguring an IronStack” on page 287.
When a unit is removed from a stack, the Active Controller deletes this unit configuration if it is
dynamically learned. Refer to “Brocade IronStack terminology” on page 237 for definitions of static
and dynamic configurations.
Replacing an IronStack unit (unit replacement)
Replacing with a clean IronStack unit
If the stack unit ID numbering is sequential, you can easily swap a failed unit with an identical clean
unit using this procedure.
1. Remove the old unit from the stack.
2. Make sure that the hardware (module) configuration of the replacement unit is identical to that
of the failed unit.
3. Connect the new unit to the stack using the same stacking ports used by the old unit.
4. If the configuration of the replacement unit matches the configuration on the Active Controller,
the Active Controller resets the new unit, which automatically becomes active in the stack, and
the stack retains its original topology.
Replacing with multiple clean IronStack units
If you are replacing multiple old units with clean units, the Active Controller replaces the unit with
the lowest ID first. For example, if you remove units 5 and 6 (which are FCX624P-STK devices), the
Active Controller assigns ID 5 to the first new FCX624P-STK device you install. If you wanted this
particular unit to replace unit 6, instead of unit 5, you must use secure-setup.
You must use secure-setup If the replacement is not a clean unit, the connection is not sequential,
or you do not want the Active Controller to trigger an automatic replacement. Use the following
steps.
1. Remove the old stack unit from the stack
2. Connect the new unit to the existing stack using the same stacking ports used by the old unit.
3. Run secure-setup to select the ID of the old unit for the new unit. The Active Controller resets
the unit, and it joins the stack.
NOTE
Adding, removing or replacing a stack unit which is not at the end of linear topology may cause the
other units in the stack to reset if these units lose their path to the Active Controller during the
process. Adding or removing a unit in a ring topology should not cause the other units to reset
because each unit can still find a path to the Active Controller.