One dhcp server multiple DNS

[Simon Hobson]

Suhaime Raeze wrote:

>in my dhcpd.conf config i have set a group of static ips 
>(192.168.1.1-180) and the rest is obtain via normal DHCP process. 
>Clients who obtain IPs via the static IPs are internet enabled 
>client whereas the rest is non-internet enabled clients.
>
>I am wondering whether the statement
>
>option domain-name-servers
>
>can be repeated for the block of IPs pool i.e. 192.168.1.181-254

Yes.

This does sound a bit like an RTFM situation ... 'man dhcpd.conf' is 
your friend here, and if you want a really good text then "The DHCP 
Handbook" by Ralph Droms and Ted Lemon comes highly recommended.


You can define and redefine most options in any scope - and the 
server will use the most specific. Eg, you can define DNS servers 
globally, then override that setting for just one subnet, or just one 
pool, or just one host. Eg :

option domain-name-servers a.b.c.d ;

subnet ..... {
   ....
}

subnet ..... {
   option domain-name-servers e.f.g.h ;
   pool {
     ....
   }
   pool {
     option domain-name-servers i.j.k.l ;
     ....
   }
}

group {
   option domain-name-servers m.n.o.p ;
   host .... {
   }
   host .... {
   }
}

host .... {
   ....
   option domain-name-servers q.r.s.t ;
}


If you don't specify an option in any particular scope, it is simply 
inherited from the enclosing scope. If you do specify one, then it 
overrides it.

It sounds like what you want to do is enclose your fixed address host 
declarations in a group statement, then add an "option 
domain-name-servers ..." to the group - that way you only have to 
specify it once for the whole group.