We have been testing NDI here on a Cisco SG300-10 switch. We originally purchased this switch due to a recommendation by Yamaha for use with Dante Audio.
Our test case resolution was 9696 x 1920 resolution. We could only get smooth playback at about half that resolution. At the required resolution we were getting very bad frame dropping. By setting our NIC to use Jumbo Packets at the largest setting - 9014 Bytes the frame drops have completely disappeared.
Be advised not all switches will support Jumbo Frames. We suggest a managed switch for both Dante and NDI.
Wiki has been updated with info -
Special thanks to Takanori Aoki of Tokyo Broadcasting System for this suggestion.