Sounds like the firmware is not the same. Use the command >show version, to see what firmware the switches are on. The replacement switch will need to be on the same firmware as the stack. If they are mismatched, now might be a good time to get them all up to date. [URL] let us know what you find.
Hello, We've just had a power connect 6224 replaced under warranty. - I removed the stacking module from the faulty switch and installed in the new switch. - Powered up the replacement switch and enabled the stacking ports - Saved config, powered down - Attached to other switch in stack with stacking cables - Powered up new switch - Restarted master - Master switch is backup and functioning normally, however the member switch is showing "code mismatch" ? I've tried powering off the member, removing the member from the stack, then powering back on (I can't reset the master again until out of hours). But I still get the same code mismatch. Any suggestions?
Replacement Power Connect 6224 adding to stack