On 2/24/2014 7:00 PM, knot-dns-users-request(a)lists.nic.cz wrote:
  Date: Mon, 24 Feb 2014 09:16:27 +0100
 From: Jan Kadlec <jan.kadlec(a)nic.cz>
 To: "Maren S. Leizaola" <leizaola(a)hk.com>
 Cc: knot-dns-users(a)lists.nic.cz
 Subject: Re: [knot-dns-users] GLUE and additional records.
 Message-ID:
        <1393229787.1717.12.camel(a)labs.jan.kadlec.ws.eth.1.office.nic.cz>
 Content-Type: text/plain; charset="UTF-8"
 Hello Maren and thanks for your report. Knot normally sends glue records
 in additional section, it seems as if you might have encountered a bug.
 Could you provide more data? One NS, A (AAAA) combination and a dig
 output for this combination should be enough. Thanks again, Jan.
 
The environment is as follows. I host 
hk.com on 6 DNS servers, right now
5 are bind and one is Knot.  hk.com's name servers are
a,b,c,d,e,f.udrtld.net    b is running Knot.
Try this link 
www.intodns.com/hk.com
This reports that B provides no glue. Please ignore the errors on f.
i've yet not setup 
urdtld.net on it.
dig -cA 
hk.com @b.udrtld.net
when I do a
dig -cA 
hk.com @a.udrtld.net
Am I making any mistakes here?
Maren.