request for advice / building dhcpd infraestructure

[Bob Harold]

On Tue, Jun 23, 2015 at 11:54 AM, Leandro <ingrogger at gmail.com> wrote:

> Hello dhcpd users:
> Im planning to manage a /17 network using isc dhcpd. I would like to
> briefly describe my plan so I can get any comments/advices  from the list.
> My dhcp server will receive requests from approximately 20 relay agents
> from 3 different access technology.
> I dont know in advance behind wich relay will be most ip usage since I can
> not predict witch service will grown over the others.
> In order to be able to be flexible with ip pools management, Im thinking
> on:
>
>     Create a class per each agent.circuit-id
>     Subneting the  /17 in /24 subnets
>     Create a pool declaration per each subnet.
>     Add / Delete "allow members of" statements within the pool declaration
> to bind a relay-agent with one or multiple pool
>
> I also would like to create a default class just in case I can not get the
> option 82 info from some relay-agent, I dont know how to do it yet.
> It would be for example with 3 class and 3 pools:
>
> #########################################
> class "fth_clients" {
>                 match if option agent.circuit-id = "fth_relay";
>             }
>
> class "adsl_clients" {
>                 match if option agent.circuit-id = "adsl_relay";
>             }
>
> class "default_clients" {
>                 match if option agent.circuit-id = "";     #need to confirm
>             }
>

If it does not work as written, then maybe you could try:
    match if not(  option agent.circuit-id = "fth_relay" or option
agent.circuit-id = "adsl_relay" );
(That does not scale well, but should work for a small number of classes.)

-- 
Bob Harold

>
>
> shared-network my_pool {
>         subnet 1.1.1.0 netmask  255.255.128.0 {
>
>         #1.1.1.0/24 for all clases
>         pool {
>             range 1.1.1.2 1.1.1.254;
>             option broadcast-address 1.1.1.255;
>             option subnet-mask 255.255.255.0;
>             option routers 1.1.1.1;
>             allow members of "fth_clients"
>             allow members of "adsl_clients"
>             allow members of "default_clients"
>         }
>
>         #1.1.2.0/24 only for adsl_clients
>         pool {
>             range 1.1.2.2 1.1.2.254;
>             option broadcast-address 1.1.2.255;
>             option subnet-mask 255.255.255.0;
>             option routers 1.1.2.1;
>             allow members of "adsl_clients"
>         }
>
>    }
> }
>
> ###################################33
> Any comment / Advice will be accepted,
> Thanks!!!
> Leadro.
>
>
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