Same MAC - diffrent IP depending on the contex (class)?

[Robert Socha]

Hi,

Thank you :)

But:

 >>> I looking for solution with static assignments (not dynamic pool's)
 >>> for netboot network (we some logic behind this assigned IP's)

With my patch DHCP is stateless (so I can use HA via load balancer).

Best regards


W dniu 14.08.2020 o 04:09, glenn.satchell at uniq.com.au pisze:
> Hi Robert,
> 
> That's one way to do it.
> 
> The other way would be to create a class and two pools for each host. In 
> the pools have a single IP address in the range. The class would select 
> based on PXE and ethernet. This would be ok for a few clients, but if 
> you have hundreds it might not scale well.
> 
> regards,
> -glenn
> 
> On 2020-08-13 22:54, Robert Socha wrote:
>> Hi,
>>
>> I was unable to find solution for my problem, so I implemented it in
>> source code.
>> I added "match if" directive to host definition which allows me to do
>> something like this:
>>
>> option client-architecture code 93 = unsigned integer 16;
>>
>> class "is-netboot" {
>>         match if exists client-architecture and (not (option
>> user-class="iPXE"));
>> }
>>
>>
>> host O000C29EF4070 {
>>    hardware ethernet 00:0C:29:EF:40:70;
>>    fixed-address 20.20.20.20;
>>    option routers 10.10.10.10;
>>    option subnet-mask 255.255.255.255;
>> }
>>
>> host N000C29EF4070 {
>>    match if "is-netboot";
>>    hardware ethernet 00:0C:29:EF:40:70;
>>    fixed-address 100.64.4.2;
>>    option routers 100.64.4.1;
>>    option subnet-mask 255.255.255.252;
>> }
>>
>> I also added support for globbing for include directive:
>>
>> include "/etc/dhcp/host/*.conf"
>> include "/etc/dhcp/host/*/*.conf"
>>
>> to recursively include files from folder and subfolders.
>>
>> Best regards
>>
>>
>> W dniu 07.08.2020 o 23:02, Robert Socha pisze:
>>> Hi,
>>>
>>> I wonder if it's possible to achieve this in ISC DHCP:
>>>
>>> - I have static hosts only (only known clients - no dynamic assignments)
>>> - I need to assign different addresses to host depending on if it's 
>>> boot client (PXE or UEFI), or if it's OS (linux,windows,etc) DHCP 
>>> client discover
>>>     ( I need that because we use RFC3021 or /32 route-able IP 
>>> assignments to customer services and this addresses are not supported 
>>> by UEFI firmware).
>>>
>>> So something like this (in pseudo config) or as idea:
>>>
>>>
>>> # arch-type  -> option 93
>>> if(if exists arch-type) {
>>>      # Private/netboot subnet
>>>      host N000c290e741d {
>>>              hardware ethernet 00:0c:29:0e:74:1d;
>>>              fixed-address 100.120.120.2;
>>>              option routers 100.120.120.1;
>>>              option subnet-mask 255.255.255.252;
>>>      }
>>> } else {
>>>      # This for "public" network - discovers from "not boot agent"
>>>      host O000c290e741d  {
>>>              hardware ethernet 00:0c:29:0e:74:1d;
>>>              fixed-address 10.255.255.11;
>>>              option routers 10.255.255.10;
>>>              if option vendor-class-identifier="MSFT 5.0" {
>>>                      option subnet-mask 255.255.255.255;
>>>              } else {
>>>                      option subnet-mask 255.255.255.254;
>>>              }
>>>      }
>>> }
>>>
>>> I looking for solution with static assignments (not dynamic pool's) 
>>> for netboot network (we some logic behind this assigned IP's)
>>>
>>> Best regards
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-- 
Robert Socha