Secondary DNS

["santosh kumar" <santoshk athenasemi com>]

Hi everyone,

Have small doubt about secondary DNS. I have a primary  DNS server with
redhat 7.2 which is configured with 2 NICs, one for public IP & other
for local IP. My doubt is to configure secondary DNS shall I need again
2 NIC cards & how to promote a secondary DNS in case of Primary DNS down
I want to configure Secondary DNS & test it for disaster recovery, so I
can avoid down time in case of problem with Primary DNS server...
Desperately waiting for all guru's answers...

Thanks & Regards,
santosh
ph : 080-5273061,5202417