红帽全球峰会2.10. Zone transfers in IdM
In an Identity Management (IdM) deployment that has integrated DNS, you can use zone transfers to copy all resource records from one name server to another. Name servers maintain authoritative data for their zones. If you make changes to the zone on a DNS server that is authoritative for zone A DNS zone, you must distribute the changes among the other name servers in the IdM DNS domain that are outside zone A.
The IdM-integrated DNS can be written to by different servers simultaneously. The Start of Authority (SOA) serial numbers in IdM zones are not synchronized among the individual IdM DNS servers. For this reason, configure your DNS servers outside the to-be-transferred zone to only use one specific DNS server inside the to-be-transferred zone. This prevents zone transfer failures caused by non-synchronized SOA serial numbers.
IdM supports zone transfers according to the RFC 5936 (AXFR) and RFC 1995 (IXFR) standards.
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