OMAPI Host Object and Duplicate MACs in different subnets

[Caciano Machado]

What I need is something like this:

# from dhcpd.leases
...
host X.Y.Z.1 {
  dynamic;
  hardware ethernet 00:01:f4:0c:17:fb;
  fixed-address 143.54.254.1;
  group "56";
        supersede server.max-lease-time = 00:f0:99:b1;
        supersede domain-name-servers = concat (8f:36:01:5e, 8f:36:01:5f);
        supersede routers = 8f:36:ea:01;
        supersede server.default-lease-time = 00:f0:99:c0;
        supersede domain-name = "subnet1.ufrgs.br";
}

host X.Y.Z.2 {
  dynamic;
  hardware ethernet 00:01:f4:0c:17:fb;
  fixed-address 143.54.1.1;
  group "57";
        supersede server.max-lease-time = 00:f0:99:c0;
        supersede domain-name-servers = concat (8f:36:01:5e, 8f:36:01:5f);
        supersede routers = 8f:36:01:01;
        supersede server.default-lease-time = 00:f0:99:c0;
        supersede domain-name = "subnet2.ufrgs.br";
}
...

When I try to create X.Y.Z.2 I get an error.

On Tue, Jul 8, 2008 at 12:42 PM, Glenn Satchell
<Glenn.Satchell at uniq.com.au> wrote:
>
> If this were being configured in dhcpd.conf then you would assign each
> host statement a unique name and it would work. But I see there's no
> way to do that in omapi, so I can't see a way to do what you want
> without modifying the source.
>
> Mac address is usually supposed to be unique - can you modify the
> clients that have the same mac and make it unique?

Unfortunately, it's hard to modify the clients. I don't have control
over them :-(.

>
> regards,
> -glenn
>
>>Date: Tue, 8 Jul 2008 12:35:00 -0300
>>From: "Caciano Machado" <caciano at gmail.com>
>>To: dhcp-users at isc.org
>>Subject: Re: OMAPI Host Object and Duplicate MACs in different subnets
>>
>>Glenn,
>>
>>It's not exactly what I need.
>>
>>My problem is: different machines which have the same MAC address but
>>are in different subnets. They may have different configurations.
>>
>>Anyway, I tried to create a host entry with the parameter
>>fixed-address using more than one IP, but it's not possible. OMAPI
>>takes only the first argument.
>>
>>Any ideas?
>>
>>Thanks,
>>Caciano Machado
>>
>>On Tue, Jul 8, 2008 at 12:00 PM, Glenn Satchell
>><Glenn.Satchell at uniq.com.au> wrote:
>>>
>>>>Date: Tue, 8 Jul 2008 11:47:44 -0300
>>>>From: "Caciano Machado" <caciano at gmail.com>
>>>>To: dhcp-users at isc.org
>>>>Subject: OMAPI Host Object and Duplicate MACs in different subnets
>>>>
>>>>Hi,
>>>>
>>>>I have a problem with the following scenario:
>>>>
>>>>A central DHCP server and many subnets which forward the DHCP requests
>>>>through DHCP relays. The central server is managed via OMAPI. We
>>>>manage static hosts configurations using it.
>>>>
>>>>The problem occurs when a subnet has a duplicate address interface...
>>>>ISC DHCP don't permit this situation using OMAPI even if the
>>>>interfaces are in different subnets. OMAPI doesn't have a way to tell
>>>>to DHCP in which subnet the host is located.
>>>>
>>>>Anyone has a solution to this problem?
>>>>
>>>>Regards,
>>>>Caciano Machado
>>>>
>>> In dhcpd.conf it is legal to have more than one address in the
>>> fixed-address statement.
>>>
>>> For example if you have one host which might need fixed addresses in
>>> more than one subnet you can use:
>>>
>>> host mylaptop {
>>>  hardware ethernet c:0:f:f:e:e;
>>>  fixed address 192.168.1.1, 192.168.2.20, 192.168.50.99;
>>> }
>>>
>>> Can you do this with omapi commands? Select using the mac address, then
>>> add multiuple IP addresses?
>>>
>>> set ip-address = 192.168.1.1, 192.168.2.20, 192.168.50.99
>>>
>>> I'm not able to test this here, but it might be worth trying.
>>>
>>> regards,
>>> -glenn
>>>
>>>
>>>
>>
>
>
>