Apex domains cannot have CNAME records.
Question and response
Question
dig agadmin.lsu.edu. NS
Answer
agadmin.lsu.edu. 5 NS lsu-bdds2.lsu.edu.
agadmin.lsu.edu. 5 NS lsu-bdds4.lsu.edu.
agadmin.lsu.edu. 5 NS lsu-bdds6.lsu.edu.
Authority
The response has no authority records.
Additional
lsu-bdds2.lsu.edu. 5 A 192.16.176.89
lsu-bdds4.lsu.edu. 5 A 192.16.176.87
lsu-bdds6.lsu.edu. 5 A 96.125.1.250
lsu-bdds2.lsu.edu. 5 AAAA 2620:105:b050:1550:0:0:0:89
lsu-bdds4.lsu.edu. 5 AAAA 2620:105:b050:1550:0:0:0:87
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0