The core of the OET 15x4 / OBD 1514 is basically a managed switch, and support DANTE among many other features /Settings.
Our configuration software LynxCentraal or yelloGUI does not offer port configuration for it being a simple Ethernet to Fiber Transceiver (switch).
IGMP snooping is supported by the CHIP, default = OFF, you will require a 3rd party port management tool for configuration.