[Kea-users] one interface, multiple subnets

Marco Broglia marco.broglia at mutex.it
Mon Oct 23 09:07:05 UTC 2017


> On 16/10/2017 19:45, Francis Dupont wrote:
>> => in fact not only you can but it is likely the easiest.
>>
>> But if you can wait for the next release (end of this month) it has
>
> Francis is talking about 1.3.0-final, the beta has been released. It
> would be great if you could test it. It's available for download from
> here: http://ftp.isc.org/isc/kea/1.3.0-beta/
>

We've tested it, and it (almost) worked.

Server is 10.1.1.11/24.

Why almost ? Because the following conf does not work: there are no 
subnet section in the same server subnet:

---
"Dhcp4": {
   "interfaces-config": {
       "interfaces": [ "em0" ],
       "dhcp-socket-type": "raw"
   },

   ...

   "shared-networks": [ {
     "name": "shared-test",
     "subnet4": [
       {
         "subnet": "10.1.2.0/24",
         "id": 1012,
         "option-data": [
           { "name": "routers",           "data": "10.1.2.254" },
           { "name": "broadcast-address", "data": "10.1.2.255" }
         ],
         "reservations": [
           { "hw-address": "mac1", "ip-address": "10.1.2.22" }
         ]
       },
       {
         "subnet": "10.1.3.0/24",
         "id": 1013,
         "option-data": [
           { "name": "routers",           "data": "10.1.3.254" },
           { "name": "broadcast-address", "data": "10.1.3.255" }
         ],
         "reservations": [
           { "hw-address": "mac2", "ip-address": "10.1.3.33" }
         ]

     ]
   } ],

   ...

},
---

BUT, if we add the following section:

---
       {
         "subnet": "10.1.1.0/24",
         "id": 1011,
         "option-data": [
           { "name": "routers",           "data": "10.1.1.254" },
           { "name": "broadcast-address", "data": "10.1.1.255" }
         ],
         "reservations": [
           { "hw-address": "fake mac", "ip-address": "10.1.1.11" }
         ]
       },
---

then the server works and give the two ip (10.1.2.22 and 10.1.3.33) 
correctly, also if we don't use subnet 10.1.1.0/24 for dynamic dhcp.

Bye.
Marco Broglia.

-- 
% Marco Broglia
% via per Vimodrone 9, 20093 Cologno Monzese (MI)
% email: marco.broglia at mutex.it


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