[Samba] Replacing one of my Samba DCs

[smodep at icloud.com]

I started with two Samba DCs running 4.14.7 (camus and cristal). I am
replacing them with newer OS and Samba versions with an eye to get
everything current. At this point, I have taken the baby step of adding a
third server running 4.15.13 (frangelico). I have added the new system to
the domain, it is participating as a DC and replication is working nicely.
After a few days, I transferred all the FSMO roles to this new DC. I will
soon be dropping one of the older servers and repeat the cycle to get the
other old one updated.

 

My issue is the SOA record. While all three servers show up in NS records
for the domain, the SOA points specifically to one of the old servers
(camus). Here is an excerpt from samba-tool dns query:

 

    SOA: serial=1641, refresh=900, retry=600, expire=86400, minttl=3600,
ns=camus.knada.lan.kitsnet.us., email=hostmaster.knada.lan.kitsnet.us.
(flags=600000f0, serial=110, ttl=3600)

    NS: camus.knada.lan.kitsnet.us. (flags=600000f0, serial=110, ttl=900)

    NS: cristal.knada.lan.kitsnet.us. (flags=600000f0, serial=110, ttl=900)

    NS: frangelico.knada.lan.kitsnet.us. (flags=600000f0, serial=110,
ttl=900)

    A: 192.168.xxx.aaa (flags=600000f0, serial=110, ttl=900)

    A: 192.168.xxx.bbb (flags=600000f0, serial=110, ttl=900)

    A: 192.168.xxx.ccc (flags=600000f0, serial=110, ttl=900)

 

1.	Should I have expected the ns in the SOA record to have been updated
with the FSMO transfer, or are these unrelated activities? 
2.	Can I update the ns clause in the SOA record to simply point to the
domain, or must I continue to point at one specific host? 

 

Thanks,

Peter