What could be the problem with dns?

Question

linux

Recently added a subdomain with a cname entry pointing to another subdomain. It's been about a week now and everything has been updated. But today I noticed in one serviced local network that the subdomain does not resolve. Bind on centos 7 acts as a DNS there, on which a couple of its zones are raised, and the rest is transferred to the gateway, which in turn has DNS from Google.
A strange thing is happening.
I do dig sub.domen.ru:
;; ANSWER SECTION:
sub.domen.ru. 518 IN CNAME sub2.domen.ru.
;; AUTHORITY SECTION:
en. 528 IN SOA a.dns.ripn.net. hostmaster.ripn.net. 4034795 86400 14400 2592000 3600
;; Query time: 0msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri Aug 03 20:04:11 +07 2018
;; MSG SIZE rcvd: 139
Doing nslookup sub.domen.ru:
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find 1c.fabrika-start.ru: NXDOMAIN
What is it? How to win?

Answer 1

There is a typo in CNAME fabrka instead of fabrika.