Slave DNS Server - to act as fail over

view story

http://www.linuxquestions.org – Hi - im running two name servers using bind9 in my infrastructure. both are identical distros ubuntu 10.04. Both are also receiving updates from each other, so no worries there. The issue is, when the master name server goes down, the slave for some reason doesnt take over and act as a primary name server. Can someone please help me on how to enable this feature using bind9? What basically I want to happen is when the master server goes down, slave will take over the primary role till the master comes back online. Cheers! DB (HowTos)