Heavy config file and vlan usage
Simon Hobson
dhcp1 at thehobsons.co.uk
Tue Jun 19 18:07:18 UTC 2007
Emmanuel Lesouef wrote:
> > Can you clarify what you want - I can see two interpretations and the
>> answers are different (yes or no) depending on what you are trying to
>> do !
>Currently, my DHCP update a DNS zone : testzone.intra
>
>There are several type of equipments ont the different vlans. For
>example, laptops, PCs and other computers are on vlan 3 whereas Avaya IP
>phones are on vlan 4.
>
>What I wanted to do, is to put IP phones on a DNS zone such as
>ipphones.testzone.intra.
OK, so the question is wrong !
Simple way to do this is to set ddns-domainname name to
ipphones.testzone.intra in the appropriate subnet declaration. Each
subnet can have it's own options, as can individual pools, or
individual hosts - and not forgetting classes.
The server will take care of updating the appropriate zone automatically.
Eg:
subnet .... {
ddns-domainname = "pcs.testzone.intra";
....
}
subnet .... {
ddns-domainname = "ipphones.testzone.intra";
....
}
So in fact the server never has to update anything other than
ddns-domainname so the question is the wrong question for the problem
!
You almost never need to alter ddns-rev-domainname.
If you allow updates by IP address then you do not even need any zone
declarations in the dhcp config, it will automagically find the
master server (it uses the authoritative server identified in the SOA
record). If you do secure updates (ie by key) then you will have to
define each zone, which is not necessarily the same as each domain
name used.
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