TOPIC HANDLING IN MQTT NETWORKS

There is provided mechanisms for configuring an MQTT client node with a topic prefix. A method is performed by the MQTT client node. The method comprises sending a request to a DHCP server for configuration. The method comprises receiving a response from the DHCP server. The response comprises configuration information and at least one prefix string defining the topic prefix to be used together with a topic by the MQTT client node when publishing data on said topic.