An aircraft gas turbine engine assembly includes an inter-turbine frame axially located between high and low pressure turbines. The iodinecompound containing iodine isare preferably present in the form of a solution or a dispersion in at least one polar solvent. The inline switches in some embodiments are service switches that receive data messages from the SCNs, identify service nodes in a service-node cluster for processing the data messages based on service policies that the switches implement, and use tunnels to send the received data messages to their identified service nodes.