Bidirectional capability indicates an ATM-LSR issuing this option can, within a single VPI, support binding of the same VCI to different routes on the different directions of the link. Unidirectional capability indicates an ATM-LSR issuing this option can, within a single VPI, a single VCI may appear in one binding only. In such systems when a VCI has been bound in one direction on the link it may not be used in the other. When several LSRs on a LAN allocate the same label range, this field is used to determine which one of those LSRs may keep the allocation. The Priority field is treated as a 32-bits unsigned integer.
Higher value is associated with higher Priority.
Security considerations are not discussed in this memo.