Queue managers hosted on different machines can be created with the same name, but if they are intended to be used on the same network, you must not give them the same name. Names that are not unique might cause errors such as preventing you from creating channels for distributed queuing.
The IBM MQ Information Center contains guidelines for naming queue managers, including prefixing each queue manager name with its own unique node name.
Two queue managers were found with names that differed only in the capitalization of one or more letters. Although this problem is not an error in itself, it could lead to confusion.
The IBM MQ Information Center contains guidelines for naming queue managers, including a suggested naming convention of using uppercase names for all queue manager names so that you can communicate with queue managers on all platforms.