DNS Delegations May Fail

MORE INFORMATION

Glue records are records that allow a DNS to find another DNS that has been designated as authoritative for a particular domain.

For instance, if you want to delegate authority for the ESS domain in the MICROSOFT.COM zone to a computer called mydnsserver, you would create the following records:

    ess      IN NS mydnsserver.ess.microsoft.com.
    mydnsserver.ess.microsoft.com.   IN A  w.x.y.z
				

where w.x.y.z is the IP address for mydnsserver.

The glue record is the "A" record. Glue records are not technically part of the zone's authority. Cached data also is not part of a zone's authority. Cached data eventually expires and gets deleted out of memory. Glue data may also inadvertently get deleted with the cached data.