You do not need two NICs in the secondary DNS. However, you secondary DNS server should be accessible in the case of primary DNS failure. For example, if you will place your primary DNS on the router, which connect your secondary DNS server to Internet (I think that you use such a configuration because you have two NICs in the primary DNS), and that router fails, you will not have access from the Internet to your secondary DNS server and you will not have disaster recovery capability for the clients from the Internet.
You should list yor secondary DNS server in the NS record for the zone which it will serve in the same way as you did for primary DNS. Clients will use both NS records for primary and secondary DNS servers. Therefore, as long as both servers work each of then will serve one half of client requests, and when one of them fails all requests will be addressed to the working server. Of course, it is the description of the typical situation. If you have some unusual network configuration or requirements, the DNS configuration could be more complex. Alexey Fadyushin. Brainbench MVP for Linux. http://www.brainbench.com santosh kumar wrote: > > 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 > > -- > redhat-list mailing list > unsubscribe mailto:[EMAIL PROTECTED] > https://listman.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
