Comment # 1 on bug 979094 from Jason Mader

The same sort of problem exists with CUPS, if the device-uri is an IPv6 service
address,

 dnssd://HP-M570dn-628188._ipp._tcp.local/

CUPS cannot connect,

E [09/May/2016:11:50:45 -0400] [Job 14] The printer is not responding.

11:49:38.474906 IP6 ccsa-2115I.local.mdns > ff02::fb.mdns: 0 [1a] [4q] SRV
(QM)? HP-M570dn-628188._ipp._tcp.local. AAAA (QM)? NPI628188.local. A (QM)?
NPI628188.local. TXT (QM)? HP-M570dn-628188._ipp._tcp.local. (634)
11:49:38.475291 IP6 NPI628188.local.mdns > ff02::fb.mdns: 0*- [0q] 2/0/2 (Cache
flush) AAAA fe80::cacb:b8ff:fe62:8188, (Cache flush) SRV NPI628188.local.:631 0
0 (143)