Minor mismatch for stack units
With a minor mismatch, an operating stack can still exist, but traffic is dropped from all ports except the stacking ports for units with the mismatched software. You can download the correct image to the mismatched devices from the active controller. A minor software mismatch means that there is no IPC or election algorithm change, but there is a release version disparity. Minor software mismatches can occur with patch release upgrades. The system logs and displays a message similar to the following.
Warning! put stack unit 2 to non-operational reason=image mismatch
The show stack command displays output similar to the following.
T=1h10m1.8: alone: standalone, D: dynamic cfg, S: static ID Type Role Mac Address Pri State Comment 1 S ICX7750-20QXG active 748e.f8f9.6300 0 local Ready 2 S ICX7750-20QXG member cc4e.2438.7280 0 remote NON-OP: image mismatch 3 S ICX7750-20QXG standby cc4e.2438.7500 0 remote Ready active standby +---+ +---+ +---+ =2/1| 1 |2/4==2/1| 3 |2/4--2/1| 2 |2/4= | +---+ +---+ +---+ | | | |-------------------------------------
Normally, the system recovers from a minor image mismatch using the Auto Image Copy feature. However, if the feature has been disabled or if the configuration of a stack unit does not match the configuration of the active controller, the stack unit does not function. In this example, unit 2 is non-operational due to an image mismatch. To correct this situation, use the copy flash flash command. Refer to Copying the flash image to a stack unit from the active controller.