DNS lookup getting Non-existent domain error - dns

Question

I have two mirrored forward DNS server(for simplifying, named f1, f2) which forward some domain request to my authoritative DNS server(also named a1, a2), I added some new domain to my authoritative DNS server, but when I nslookup the new domain from f1 or f2, I got Non-existent domain error like the following. If I nslookup from a1 or a2, it worked.
C:\Users\Liu.D.H>nslookup www.yqsbfiles.ynu.edu.cn
Server: ynu-public-dns-a.ynu.edu.cn
Address: 113.55.13.51
*** ynu-public-dns-a.ynu.edu.cn can't find www.yqsbfiles.ynu.edu.cn: Non-existent domain
C:\Users\Liu.D.H>
I also used dig to get more debug info.
C:\Users\Liu.D.H>dig www.yqsbfiles.ynu.edu.cn #113.55.13.52
; <<>> DiG 9.10.6 <<>> www.yqsbfiles.ynu.edu.cn #113.55.13.52
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 28130
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.yqsbfiles.ynu.edu.cn. IN A
;; AUTHORITY SECTION:
ynu.edu.cn. 9936 IN SOA pridns.ynu.edu.cn. root.pridns.ynu.edu.cn. 2016062301 10800 3600 604800 86400
;; Query time: 0 msec
;; SERVER: 113.55.13.52#53(113.55.13.52)
;; WHEN: Fri Jun 08 10:44:35 China Standard Time 2018
;; MSG SIZE rcvd: 101
C:\Users\Liu.D.H>
But the strange thing was that if I did rndc flush on one of f1 or f2, then I can request successfully.
C:\Users\Liu.D.H>dig www.yqsbfiles.ynu.edu.cn #113.55.13.51
; <<>> DiG 9.10.6 <<>> www.yqsbfiles.ynu.edu.cn #113.55.13.51
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4168
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 5
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.yqsbfiles.ynu.edu.cn. IN A
;; ANSWER SECTION:
www.yqsbfiles.ynu.edu.cn. 86400 IN CNAME lb-http.ynu.edu.cn.
lb-http.ynu.edu.cn. 86393 IN A 202.203.208.41
;; AUTHORITY SECTION:
ynu.edu.cn. 86391 IN NS secdns.ynu.edu.cn.
ynu.edu.cn. 86391 IN NS pridns.ynu.edu.cn.
;; ADDITIONAL SECTION:
pridns.ynu.edu.cn. 86396 IN A 202.203.208.33
pridns.ynu.edu.cn. 86396 IN AAAA 2001:250:2800:2::33
secdns.ynu.edu.cn. 86391 IN A 202.203.208.34
secdns.ynu.edu.cn. 86391 IN AAAA 2001:250:2800:2::34
;; Query time: 2 msec
;; SERVER: 113.55.13.51#53(113.55.13.51)
;; WHEN: Fri Jun 08 10:43:02 China Standard Time 2018
;; MSG SIZE rcvd: 221
C:\Users\Liu.D.H>
I noticed that this two dig output had something different in AUTHORITY SECTION.
Any help would be appreciated. Thanks in advance.

Answer 1

You need to register the Authoritative Domain name server with the domain registrar for your new domain pointing to a1 and a2. After that it will work fine.