Glue is required but not provided. No IPv4/IPv6 glue found on some authoritative or parent name servers.
Impact: High
Common error ID: wxa-1009
What this means
Glue records are necessary to resolve the IP addresses of name servers that are within the same domain they serve, sometimes called ‘in-zone’ name servers. Without these glue records, DNS resolvers will not be able to find the name servers, leading to resolution failures.
Why this is a problem
Without glue records, DNS queries will fail, causing the domain to be unreachable. This can lead to service disruptions and accessibility issues for users trying to reach the domain.
How to check if the problem is still there
Use the dig command to look up the NS records and check if the corresponding A or AAAA records (glue records) are present.
Example
dig ns example.gov.uk +short ns1.example.gov.uk ns2.example.gov.uk
The name servers use the same domain they are serving, so glue records are needed in the parent zone.
Look up the name server for the parent zone.
dig ns gov.uk +short dns2.nic.uk. nsc.nic.uk. dns4.nic.uk. dns3.nic.uk.
Now ask one of the parent name servers for the glue record for the domain with the in-zone name servers.
dig a ns1.example.gov.uk @dns2.nic.uk. +short 203.0.113.0
If the correct IP address is returned the glue records are present and the problem should be resolved. If no IP is returned the problem remains.
How to fix it
Add A and / or AAAA records for the in-zone name servers in your parent zone file to provide the necessary glue. If you do not manage the parent zone (for example the domain has been delegated to you by another organisation) then you will need to contact them to update the glue records.