[cobalt-users] Swapping IP addresses on 2 raqs to improve DNS setup

["Peter" <pw@xxxxxxxxxxxxxx>]

I am trying to add some redundancy by improving my DNS setup now I have 
2 raqs.  I have read other postings on setting up master and slaves but 
none answer this particular question.
 
I have 2 raqs and I would like each raq to act as both a Master/Primary 
Nameserver and a slave/secondary.  At the moment each raq acts provides 
primary and secondary nameservers which I know isn't the best.

Currently I have 4 nameservers set up as follows: 
On raqA: 
ns.domain1.com XXX.XXX.XXX.1  (primary)
ns2.domain1.com XXX.XXX.XXX.2 (secondary)
 
Both these IP's are assigned to RaqA

On raqB: 
ns.domain2.com XXX.XXX.XXX.3  (primary)
ns2.domain2.com XXX.XXX.XXX.4 (secondary)


Both these IP's are assigned to RaqB
All IPs on both raqs are on the same network.

Now unfortunately I have registered a lot of domains with either the 
domain1 or domain2 nameservers so I need to preserve all of these as I 
don't want to change the registrar records for all these domains. 

I was hoping to set it up so that one raq acts as master for 
ns.domain1.com and slave for ns2.domain2.com and vice versa. 

I think what's needed is: 
1. Swap assignment of XXX.XXX.XXX.2 and XXX.XXX.XXX.4 so they are on 
opposite boxes 
2. Enter in DNS Parameters > Server Settings > Zone Transfer Access, 
the IP address of each corresponding slave 

Is this correct? Do I need to do anything else? How does the slave know 
it is a slave? Do I need to add secondary name service for each domain 
or does the slave automatically get updated? 

I am also planning to add a 3rd nameserver outside of this network.  Do 
I simply add this IP into the zone transfer access list? 

Obviously I don't want lose any service for my customers so I want to 
be sure of the process before anything happens.  

 
Many thanks
Pete
 
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