----- Original message -----
> At present, i
> use the algorithm RSASHA-1 for DNSKEY, but i want migrate the RSASHA-1 to
> RSASHA-256, when i resigning the zone,it failed. so i wonder if   DNSSEC
> supporting migrating RSASHA-1   to RSASHA-256 smoothly?

Yes, it does. Smoothness depends on the timing. You might find this summary 
useful:
http://snad.ncsl.nist.gov/dnssec/download/DNSSEC_Algorithm_rollover.pdf

Did you create a new key with the appropriate algorithm ID? dnssec-signzone can 
only sign the zone with algorithms present in the DNSKEY set.

The actual error message would be helpful, too.

If you have registered DS records with your parent zone, you must update them 
to include the new key(s).


Hauke.

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