BIND primary + secondary, how and how many

[Mark_Andrews at isc.org]

> 
> HI!!!
> 
>  Well the subject is a bit confused....... sorry.....
> 
>  I have 4 servers (each in a diferent location and network), each of
> them have a domain with Web (apache), ftp, mail (sendmail) and bind.
> 
>  NOW *each* server has configured Bind with its own domain as primary
> and the rest of domains (of the other three servers) as slaves.
> 
>  Then each server is primary of the domain it owns and is secondary of
> the rest os the domains.
> 
>  More graphically (NOW):
> 
>  Server     primary    slaves
>  ---------  ---------  -------------------------
>  Server1    domain1    domain2, domain3, domain4
>  Server2    domain2    domain1, domain3, domain4
>  Server3    domain3    domain1, domain2, domain4
>  Server4    domain4    domain1, domain2, domain3
> 
> 
>  Well, my question is:
> 
>  Is this an optimal configuration???

	No.  It really depends upon where the people who are
	administrating the zones are located and what the zones
	are representing.

	I've done it both ways in the past.  Where the zones were
	representing different physical sites, the masters were
	within those sites.  You can add / remove machines without
	external network connectivity.

	When the zones were spread over all the sites I done it from
	a central location.

	Mark
 
>  Or it is better to configure ONE server to be primary of ALL domains
> and the rest of the servers to configure them as secondary domain
> servers.
> 
>  Server     primary    slaves
>  ---------  ---------  -------------------------
>  Server1    domain1    
>  Server2               domain1, domain2, domain3, domain4
>  Server3               domain1, domain2, domain3, domain4
>  Server4               domain1, domain2, domain3, domain4
> 
> 
> 
>  Another question is:
> 
>  What about if a primary server (any server first case and server1
> second one) is down???
> 
>  How do the secondaries respond or are been accessed????
> 
> 
>  Thanks in advance for any help??????
> 
> 
> 
> 
> 
> 
> 
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org