Dynamically assign Option to Clients:

[Bill Shirley]

I think Chris is right about the classes being mapped first.

Try a group:
group {
   option ntp-servers ntp.mydomain.com;
   option tftp-server-name "https://tftp.mydomain.com"'
   default-lease-time 600;
   max-lease-time 600;

   host tel132 {
     hardware ethernet 12:04:13:87:1c:41;
     fixed-address 172.30.20.32;
     option host-name "phone132";
   }
host tel133 {
     hardware ethernet 12:04:13:87:1c:42;
     fixed-address 172.30.20.33;
     option host-name "phone133";
   }
}

Bill

On 11/15/2017 1:18 PM, Chris Buxton wrote:
> Classes will work the way you think they should, with one exception. Client devices are mapped to classes before options 
> values are set. Therefore, you won't be able to match on a hostname that you set in a host declaration, only on the hostname 
> sent by the phone in its request.
>
> It might be better to just match on MAC addresses, since that's effectively what you want to do anyway. Something like this 
> (untested):
>
> class "phones" {
>   option ntp-servers ntp.mydomain.com <http://ntp.mydomain.com>;
>   option tftp-server-name "https://tftp.mydomain.com";
>   default-lease-time 600;
>   max-lease-time 600;
>   match hardware;
> }
>
> subclass "phones" 1:12:04:13:87:1c:41; # host phone132
>
> Note that the hardware field is 7 octets long, including a leading 1 that is there for historical reasons.
>
> Regards,
> Chris
>
>> On Nov 15, 2017, at 8:42 AM, MA2412 at gmx.de <mailto:MA2412 at gmx.de> wrote:
>>
>> Hello, i have a central dhcp server serving multiple remote networks. I want to assign the same group of options to Clients 
>> wo are on different Networks, based on MAC adress or better on hostnames. I tried to solve it over a "class" declaration, but 
>> it seams that classes are only woking in conjunction with "pools" or "subnets" or "ranges", a class declaration itself has no 
>> effect is this correkt?
>> For example i try:
>> class "phones" {
>>   option ntp-servers ntp.mydomain.com <http://ntp.mydomain.com>;
>>   option tftp-server-name "https://tftp.mydomain.com";
>>   default-lease-time 600;
>>   max-lease-time 600;
>>   match host-name;
>> }
>> host tel132 {
>>    hardware ethernet 12:04:13:87:1c:41;
>>    fixed-address 172.30.20.32;
>>    option host-name "phone132";
>> #Location: office
>> }
>> subclass "phones" "phone132";
>> The phone should get a fixed IP adress and the options defined in the class.
>> I also tried the following declaration:
>> class "phones" {
>>   option ntp-servers ntp.mydomain.com <http://ntp.mydomain.com>;
>>   option tftp-server-name "https://tftp.mydomain.com";
>>   default-lease-time 600;
>>   max-lease-time 600;
>>   match if substring(option host-name,0,7) = "phone132";
>> }
>> host tel132 {
>>    hardware ethernet 12:04:13:87:1c:41;
>>    fixed-address 172.30.20.32;
>>    option host-name "phone132";
>> #Location: office
>> }
>> Should have the same effect, but also des not work, as expected above, i thind class declaration does not work if not 
>> assigned to a pool or subnet or range.
>> Can a client be assigned to multiple classes, is this possible or can a client only be member of one class?
>> Thanks for your help!!
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org <mailto:dhcp-users at lists.isc.org>
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>
>
>
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