Brocade FastIron Ethernet Switch Stacking Configuration Guide - Manual (Page 92)

Configuration mismatches can happen during manual setups, or when moving a unit from one stack to
another stack or the ID of a unit is changed by secure-setup.
When you renumber identical units using secure-setup, the configurations are not mapped to the new
units (because they match exactly). However, if you switch the IDs of units that are not identical, a
configuration mismatch occurs.
When a configuration mismatch occurs, port-related functions on all ports are disabled on the
mismatched unit (except for the stacking ports). All other functions are unaffected. For example, the
active controller can still copy the unit's image or reset the unit.
Auto Image Copy for stack units
The Auto Image Copy feature ensures that all units in a stack are running the same flash image after a
stack merge. This feature also enables automatic reload of the stack units. It prevents the image
mismatch that occurs when one or more member units join the stack with a different running image
and signature than that of the master and standby units.
Auto Image Copy is enabled by default on devices and the user does not have to manually copy the
master’s running image to the mismatched members.
This feature is available on the following devices:
• Brocade FCX Series (FCX) Stackable Switch
• Brocade ICX 6610 Series (ICX 6610) Stackable Switch
• Brocade ICX 6430 Series (ICX 6430) Stackable Switch
• Brocade ICX 6450 Series (ICX 6450) Stackable Switch
Auto Image Copy limitations
The following limitations apply to the Auto Image Copy feature:
• This feature is applicable to those stack units that are in a non-operational image mismatch state
only.
• Auto Image Copy does not work if the image version of the IPC is different from the stack unit
version in the case of a major image mismatch.
• If a stack unit with a newer image is merged with a stack running an older version of the software,
the newly formed stack will still be running the older version of the software.
• Auto Image Copy does not work if the user has copied a different image into the flash, creating a
mismatch in versions between the flash and the running image on the active unit of the stack.
Disabling Auto Image Copy
Auto Image Copy is enabled by default. However, if you wish to disable this feature, enter the following
command in global configuration mode.
device(config)# image-auto-copy disable
Syntax: [no] image-auto-copy disable
Run the no image-auto-copy disable command to enable Auto Image Copy. This restarts the Auto
Image Copy immediately and ensures that all stack units have the same image.
NOTE
You can run the show running-config or the show stack detail command to see if Auto Image Copy
is disabled.
Auto Image Copy for stack units
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