[dns-operations] BAD (HORIZONTAL) REFERRAL in one nameserver of "mm" ?

[Stephane Bortzmeyer]

On Wed, Jul 30, 2014 at 01:55:19PM +0800,
 Zheng Wang <zheng_dns at 126.com> wrote 
 a message of 104 lines which said:

> @mm.cctld.authdns.ripe.net.   The referral is bad.

Yes, net.mm has a lame delegation:

% check-soa -i net.mm                             
mm.cctld.authdns.ripe.net.
	2001:67c:e0::96: ERROR: 0 answer (9 ms)
	193.0.9.96: ERROR: 0 answer (14 ms)
ns0.nic.net.mm.
	203.81.64.20: OK: 2014072400 (312 ms)
ns1.nic.net.mm.
	203.81.81.85: OK: 2014072400 (309 ms)
ns2.nic.net.mm.
	203.81.92.10: OK: 2014072400 (320 ms)

I often see these problems with "deep" TLD (those with registration in
a SLD). TLD managers ask for a secondary hosting and wrongly assume
that it will work for all the zones underneath.