2.3. Reserved
This 16-bit field is reserved for future use. It MUST be set to "zero" by the sender, and it SHOULD be ignored by the recipient. (Note that the value is included in the ICV calculation, but is otherwise ignored by the recipient.)
This 16-bit field is reserved for future use. It MUST be set to "zero" by the sender, and it SHOULD be ignored by the recipient. (Note that the value is included in the ICV calculation, but is otherwise ignored by the recipient.)