Replacing a stack unit automatically with a clean unit

  1. (Optional) Enter the show stack command on the active controller, and check for an "S" beside the unit to confirm that the configuration for the unit you are replacing is static.
  2. If the configuration is not static, enter the write memory command to change all dynamic configurations to static. A static configuration remains after the unit is removed.
    After the configuration is saved with the write memory command, all unit IDs are followed by an "S" as shown in the following example. 
    ICX7650-48ZP Router# show stack
T=44d13h22m38.7: alone: standalone, D: dynamic cfg, S: static
ID   Type          Role    Mac Address    Pri State   Comment
1  S ICX7650-48ZP  active  609c.9f52.2c96   0 local   Ready
2  S ICX7650-48ZP  member  609c.9f52.2b22   0 remote  NON-OP: image mismatch

    active
     +---+        +---+
     | 1 |3/1--3/1| 2 |
     +---+        +---+
Note: There is no standby. Reason: u2: not operational,
Current stack management MAC is 609c.9f52.2c96
Rear-module: config = oper = default: stack-100g
Stack ports are operating at 100G.
    When you remove a unit with a static configuration, the configuration is still present. The show stack command output lists the unit state as "reserve" as shown in the following example for unit 2. 
    ICX7650-48ZP Router# show stack
T=44d13h23m53.7: alone: standalone, D: dynamic cfg, S: static
ID   Type          Role    Mac Address    Pri State   Comment
1  S ICX7650-48ZP  active  609c.9f52.2c96   0 local   Ready
2  S ICX7650-48ZP  member  0000.0000.0000   0 reserve

    active
     +---+
  3/1| 1 |
     +---+
Current stack management MAC is 609c.9f52.2c96
Rear-module: config = oper = default: stack-100g
Stack ports are operating at 100G.
  3. Remove the old unit from the stack.
    Although the unit is absent, the provisional configuration for the unit is still retained on the active controller.
  4. Make sure that the hardware (module) configuration of the replacement unit is identical to the hardware configuration of the unit you removed.
  5. Connect the new unit to the stack using the same stacking ports as the old unit.
    If the replacement unit configuration matches the configuration retained on the active controller, the active controller resets the new unit. The new unit joins the stack, and the stack keeps its original topology.
Parent topic: Stack Unit Replacement