@Augustine_Heigh Here are two links that may help you with your switch questions: https://community.tp-link.com/en/business/forum/topic/845926...

@GRL Thank-you for the advice.

@GRL My testing has concluded for now. One of the configuration settings tried while testing was to enable the VLAN QoS Queue setting and set the queue to 7. Later, a log email was received with the...

@GRL I did go back to the previous version and it did not seem to make any difference. I have now moved all the devices (except the TV) to a makeshift test area and am in the process of monitoring...

@Vincent-TP Thank-you for the clarification.

@GRL Thank-you for your response. I did try the multicast settings but they made no difference, both with the upstream switch as the querier and querier set to none. I have just replaced one of my...