Not to preempt Andrew, but you might want to double check that your Network Bridge’s Dual AES Sample Rate setting is set for 88.2k (as stated in the manual). Any other setting and you’ll get silence on DSD or DSDx2 streams.
As for clocking; Vivaldi DAC in Master works, and it’s Word Clock OUT to Network Bridge Word Clock IN1. Just be sure to check the clocking config specifically for Vivaldi AES1+2 is set to Master (or 3+4 if thats what you’re using).
One caveat with this configuration; When playing back PCM rates lower than 88.2k, you’ll need to switch out of AES1+2 into AES1 only, otherwise you’ll hear mono 