Host Declaration

Bill Shirley bill at c3po.polymerindustries.biz
Sat Sep 23 04:39:34 UTC 2017


host statements are global.

Example:
subnet 10.10.10.0 netmask 255.255.255.0 {
     ddns-updates          on;
     default-lease-time    3600;    # 1 hour
}
group "storage" {
     ddns-updates          off;
     option log-servers    10.10.10.1;
     host storage-1        { hardware ethernet ff:ca:ff:26:30:4b;    fixed-address 10.10.10.4; }
host storage-2        { hardware ethernet ff:ca:ff:26:30:4b;    fixed-address 10.10.10.5; default-lease-time    7200; }
}

In the above example, host storage-1 will have 'ddns-updates off' and 'option log-servers 10.10.10.1'
and a lease time of 3600 when allocated from the 10.10.10.0 subnet.

Host storage-2 will have 'ddns-updates off' and 'option log-servers 10.10.10.1' and a lease time of 7200;

What problem are you trying to solve?

Bill


On 9/22/2017 9:16 AM, Jérôme BECOT wrote:
> Hello everyone,
>
> I'm wondering about the difference between declaring hosts at the global level and in their respective subnets. It looks like 
> the same to me but I may miss something about it. They would inherit the subnet parameters the same way, wouldn't it ?
>
> subnet 10.10.10.0/24 {
>   option X value;
>   host zero { .. }
> }
>
> group "site-A hosts" {
>   host one { 10.10.10.1; }
> }
>
> ....
>
> Also, what happen if I declare a group of subnets and a separate group of hosts outside, like :
>
> group "site-B subnets" {
>   option A value1;
>   subnet 10.0.0.0/8{ ... }
>   subnet 172.16.0.0./16 { ... }
> }
>
> group "site-B hosts" {
>   host zero { fixed-address: 10.0.0.1; }
> }
>
> Is host 0 receiving the option A value as well ?
>
> Thanks
>
> *JEROME BECOT
> *
> Ingénieur Système et Réseau
> DSIRN
> Bureau n°4.29
> Institut national des langueset civilisations orientales
> 65 rue des Grands Moulins
> Paris 75013, France
>
> 01 81 70 10 78
> jerome.becot at inalco.fr www.inalco.fr <http://www.inalco.fr>
>
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users

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