Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain ocp-virt5-host2.dal10.infra.demo.redhat.com is not the root of its zone.
Instead, try zone transfer on dal10.infra.demo.redhat.com .
Instead, try zone transfer on dal10.infra.demo.redhat.com .