I recently found out something weird with the GLC-SX-MM= modules on the 4506-GB-T line card.
When i change the media type to RJ-45 and remove the GBIC from the port and insert it on any other port on the line card, i get an SPF serial integrity check failure and the port stops forwarding packet. It does not resume even after doing a shut or noshut. Rebooting the switch is the only alternative to revive the port
This does not seem to be a problem if the port was configured to be a media type of SFP and the same action was performed.
So if i want to remove the GBIC from the port and eventhough the media-type is RJ-45, you need to reverse the media type to SFP, remove it and configure it back to RJ-45.
This seems to be very strange as these modules are hot swappable but you end up needing a downtime in the above case.
Is this some sort of limitation that i could not find out in CCO?