small sibling glue records help

Alan Clegg Alan_Clegg at
Wed Dec 19 14:20:14 UTC 2007

Anatoly Pugachev wrote:
> Can someone explain me, what does mean:
> 18-Dec-2007 13:34:10.856 zone '' has no SIBLING GLUE address records (A or AAAA)
> Does that mean, that i should add A record for into zone file?
> I already have 
> sub1    NS
>         NS

What this message means is that the nameservers (pointed to by the NS
records) reside within the zone for which they are authoritative.  For
the nameserver of the zone above (in this case to be able to
provide a response including the IP addresses of the nameservers for the
subordinate zone, you need the IP addresses in the parent.

In other words, yes, you should add A records for the nameservers that
live within the zone in question.  I'm thinking that your example is

 sub1    NS

In this case, you need to add: IN A x.y.z.a IN A l.m.n.o

to the zone file.  (that's the "glue")

Alan Clegg
ISC Training and Support
+1-650-423-1357 (o) +1-919-271-8851 (m)

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