MSG is a mnemonic that indicates this is a message. It is always shown as MSG . SLOT indicates the slot number of the card reporting the error. It is shown as SLOT followed by a number. For more information, see the system configuration chapter and descriptions of the logging command in the appropriate Cisco IOS configuration guide and command reference publications.
Some messages describe internal errors and contain traceback information.
This information is very important and should be included when you report a problem to your technical support representative.