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PowerConnect B-Series FCX Configuration Guide 149
53-1002266-01
Managing your IronStack
5
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.
Moving a unit to another stack
Moving a member from a stack and to another stack can result in non-sequential ID assignment.
The Active Controller will honor the new unit original ID if that ID is not being used in the new stack.
The Active Controller will assign a new ID if the original ID is already being used. To prevent
non-sequential stack ID assignments, configure the unit that is moving as a clean unit before
adding it to the new stack.
Removing an Active Controller from a powered stack
To remove an Active Controller from a powered stack, disconnect the Active Controller. The Standby
Controller waits for 30 seconds and then assumes the role of Active Controller. A single Active
Controller device functions as a standalone unit even it is still stacking-enabled. You do not have to
issue a stack unconfigure me command for an Active Controller.
Renumbering stack units
You can use secure-setup to renumber stack units in a previously constructed stack. In the
following example, three units make up a stack, yet two of the units are numbered 5 and 6 (the
Active Controller is numbered 1). Since this stack is only going to contain 3 units, you can renumber
the other units so that they are unit 2 and unit 3.
The most effective way to number your stack members is sequentially. You can skip numbers, but
they should still be sequential, from 1 to 8. Sequential numbering makes it easy to replace stack
units, and easier to troubleshoot issues.
NOTE
In a ring topology, 1, 2, 4, 5, and 1, 5, 4, 2 are both sequential.
Example
PowerConnect# stack secure-setup
PowerConnect#Discovering the stack topology...
Available UPSTREAM units
Hop(s) Type Mac Address
1 FCX624 0012.f2d5.2100
2 FCX624 001b.ed5d.9940
Enter the number of the desired UPSTREAM units (1-2)[1]: 2
Selected topology:
Active id Type Mac Address
1 FCX624 0012.f239.2d40
Selected UPSTREAM units
Hop(s) id Type Mac Address
1 5 FCX624 0012.f2d5.2100