1. After removing the old unit from the stack, connect the new unit to the stack using the same
stacking ports used by the old unit.
2. If the module configuration of the replacement unit matches the configuration on the Active
Controller, the Active Controller resets the new unit and upon boot up new unit joins the stack with
the same ID was the unit that was removed, and the stack retains its original topology.
3. If the configuration of the new unit does not match the old unit, the new unit is added with a new ID
based on the next available ID.
4. When stack has 12 units, and new unit has different hardware configuration than the old unit, the
unit will be placed in configuration-mismatch state.
Replacing multiple stack units with multiple clean stack units
1. After removing the old stack units, connect the new units to the existing stack using the stacking
ports as the old unit.
2. The active controller replaces the unit with the lowest ID first. For example, if you remove units 4
and 5, the active controller assigns ID 4 to the first new device you install.
3. If you wanted this particular unit to replace unit 5, instead of unit 4, you must use secure-setup to
select the ID of the old unit for the new unit. The active controller resets the unit, and upon boot up it
joins the stack.
Creating a stack trunk on a live stack
Assumption
1. This configuration can be done on a 4x10G stack where stack is formed using default ports and
stack trunks are not yet configured.
2. Trunk ports are connected to form trunk ie x/2/1 to x/2/2 and x/2/3 to x/2/4.
Steps
Use the multi-stack trunk command to add or remove a stack trunk on a live ICX 7450 stack.
ICX7450-24 Router# configure terminal
ICX7450-24 Router# stack unit 1
ICX7450-24 Router(config-unit-1)# multi-stack-trunk 1/2/1 to 1/2/2 and 2/2/1 to 2/2/2
ICX7450-24 Router(config-unit-1)#
Brocade ICX 7450 stacking recommendations and restrictions
1. FastIron Release 08.0.20 supports only 1x40G module supports stacking.
2. FastIron Release 08.0.30 and later releases support stacking when a 4X10GF module is present in
slot 2. Each unit must be individually configured with default stacking ports as 1/2/1 and 1/2/3 and
reloaded to join a stack, or to use secure setup.
3. The 4X10GF ports can also support MACsec but not at the same time when these ports are
configured as stack ports. By default, if a 4X10GF module is present in slot 2, it is enabled for
MACsec. However, to use the slot 2 ports for stacking, the default ports must be changed; using
default-ports command and the unit must be reloaded after saving the configuration for default ports
to be effective for stacking.
4. 1x40G module supports stacking only when it is installed in rear panel slot 3 and 4 of 24 and 48 port
SKUs.
5. 1x40G module when present in slot 2 of 24 ports SKU does not support stacking.
6. Stack ports can be configured using 'stack-port stack/slot/port' command.
7. Stack trunks are not supported on ICX 7450 devices with 1x40G stacking. But stack-trunks are
supported with 4x10G stacking ports.
8. When the stack secure-setup utility is used to configure an ICX 7450 stack, end points or ports of
the end units that are not used for stacking and that are link down are left as data ports except on
Creating a stack trunk on a live stack
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Brocade ICX 7450, Brocade ICX 7750, and Brocade ICX 7250 Stacking Deployment Guide
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