Adding DS Records for Subdelegated Domains

[rams]

Hi,
we have two scenarios as follows. Is there any chance to copy DS records
through AXFR or any another method to copy child DS records into parent
zone.

Scenario 1:
Customer has domain2.com on Bind1 signed with DS records for domain2.com at
place with registrar. Customer delegates a zone (sub.domain2.com) from
Bind1 to another DNS provider and wants to sign domain on the other provider
Assumption: We would have to host the DS records for sub.domain2.com in the
zone file domain2.com. They'd need to sign the zone on the other provider.


Scenario 2:

Customer has DS records for domain3.com at registrar and has domain3.com
and sub.domain3.com as separate zones on Bind1.
Question: Since this all on the same provider do the DS records only need
to exist at registrar? Will the separate zone create an issue since it (
sub.domain3.com) is not the same zone as what has DS records at the
provider (domain3.com)?


Thanks & Regards,

Ramesh
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