I'm setting up a failover system for DHCP and DDNS. The software being used are ISC BIND and ISC DHCP, running on Ubuntu 10.04 LTS.
serverA runs DNS01 and DHCP01, serverB runs DNS02 and DHCP02. DHCP failover is set to a 128-bit split (half the zone on each server), wich is working correctly.
serverA is set as the master DNS, serverB is secondary (slave).
Where should DHCP02 point its dynamic updates? Can a slave zone be updated with DDNS entries and then be AXFR'ed back to the master, or do I need to point all DDNS updates to DNS01, both on DHCP01 and DHCP02?
Answer
Looks like this is not doable. I tried to lab it, and the secondary DHCP fails with errors in the syslog about not being allowed to update the zone.
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