Dell PowerConnect B-FCXs Configuration Guide - Page 197

Image mismatches 5 Major mismatch A major mismatch indicates an Interprocessor Communications (IPC)-related data structure change, or an election algorithm change, or that a version of the software that does not support stacking is installed on a unit. This can happen when the software undergoes a major change (such as a change from 05.0.00 to 05.1.00). When a major mismatch occurs, the system logs and prints a message similar to the following. Warning! Recv 424 IPC in 1m from 0012.f21b.a900 e1/1/25: wrong version 5 !=6. Please make sure all units run the same image. In a major mismatch, the stack cannot be built and will not operate. You must download the correct version of the software to the mismatched units individually. Minor mismatch With a minor mismatch, an operating stack can still exist, but traffic is dropped from all ports except for 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 happen with patch release upgrades. The system logs and prints 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. PowerConnect# show stack alone: standalone, D: dynamic config, S: static config ID Type Role Mac Address Pri State Comment 1 S FCX624 active 0012.f2eb.a900 128 local Ready 2 S FCX648 standby 00f0.424f.4243 0 remote NON-OP: image mismatch 3 S FCX624 member 00e0.5201.0100 0 remote Ready If the configuration of a stack unit does not match the configuration of the Active Controller, the stack unit will not function. You must manually correct the configuration error for the unit to become operational within the stack. 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" on page 126). Configuration mismatch Generally, when a stack unit is added to or removed from the stack, its static configuration is not overwritten by the Active Controller. However, secure-setup allows you to overwrite a static configuration on a unit, in which case the Active Controller deletes the configuration for the old unit, and adds the configuration of the new unit. A configuration mismatch occurs when the base module configuration for a replacement stack unit does not match the run time configuration on the Active Controller .If the configuration on the Active Controller is static, it cannot be overwritten by the new configuration, and a configuration mismatch occurs. PowerConnect B-Series FCX Configuration Guide 155 53-1002266-01