When trying to establish a UDP connection for audio, client was getting the request, but was failing to send a response to the VDA to establish the channel.
Both DTLS 1.0 and 1.2 were enabled on the ADC
From the ADC configuration, issue was caused by ADC having DTLS 1.0 and 1.2 enabled. Only one of these should be configured, otherwise the DTLS renegotiation will encounter issues and fail.
UDP Audio doesn't establish a connection. UDP buffers being utilised and monitor states audio over UDP inactive.