This read-create boolean, when true, forces manual use of UDP encapsulation for RSVP messages on this interface regardless of neighbor capability, whereas when false UDP is only used automatically if csRsvpIfUdpNbrs is nonzero. An administrator would set this true on a link known to traverse network equipment that cannot handle raw RSVP-over-IP packets, ensuring RSVP signaling still gets through via UDP. Conversely, leaving csRsvpIfUdpRequired false on a clean, fully RSVP-aware core link avoids the extra UDP encapsulation overhead.