It turns out that for security reasons the university sets a default cap of two MAC addresses per port, so host and engine maxed it out. I requested that they increase the cap on this port and now things work as expected.

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As a result of Coronavirus-related precautions, NYU and the Center for Brain Imaging operations will be managed remotely until further notice.
All telephone calls and e-mail correspondence are being monitored remotely during our normal business hours of 9am-5pm, Monday through Friday.
 
For MRI scanner-related emergency, please contact: Keith Sanzenbach at keith.sanzenbach@nyu.edu and/or Pablo Velasco at pablo.velasco@nyu.edu
For computer/hardware/software emergency, please contact: Valerio Luccio at valerio.luccio@nyu.edu
For TMS/EEG-related emergency, please contact: Chrysa Papadaniil at chrysa@nyu.edu
For CBI-related administrative emergency, please contact: Jennifer Mangan at jennifer.mangan@nyu.edu

Valerio Luccio     (212) 998-8736
Center for Brain Imaging     4 Washington Place, Room 158
New York University     New York, NY 10003

"In an open world, who needs windows or gates ?"