[Kea-users] i do not understand the concept of shared networks

[Bob Harold]

Correct, assuming that the relay host has a different IP in each subnet.
It is probably working because you have mostly reserved.  I assume that the
dynamic pool is only in one subnet, so a device connected to another subnet
would not be able to work if it got a dynamic address, because it would be
the wrong IP address and router (gateway) address.

-- 
Bob Harold



On Wed, Mar 11, 2020 at 6:20 AM Giso Kegel <giso.kegel at cloud.ionos.com>
wrote:

> Hi Bob,
>
> thanks yes that makes sense.
> That means my 50+ networks are NOT shared networks because thy are all in
> a different Vlan behind a relay host?
> So i could live with simply subnet4 definitions without shared networks?
>
> What worked until now in my test environment is one shared network with
> all my 50 reservation subnet in it and one dyn pool.
> That one Shared network has the relay option set so that everything need
> to come from that relay host.
> Similar to that example from Satish without the relay host. @Satish Thanks
> for you response
>
> ###
> ...
>   "shared-networks": [
>
>       {
>         "name": "device-mgmt",
>         "relay": {
>                 "ip-addresses": [ "10.3.1.3" ]
>          },
>         "subnet4": [
>           {
>             "id": 2,
> ...
> ###
>
> I now understand it that way that this configuration is wrong because
> these networks are on separate VLAN and have nothing todo with each other.
> There is no network expand an existing one.
>
> Where is my misunderstanding?
>
> ---
>
> Giso
>
>
> Am 10.03.20 um 22:00 schrieb Bob Harold:
>
>
> On Tue, Mar 10, 2020 at 9:15 AM Giso Kegel <giso.kegel at cloud.ionos.com>
> wrote:
>
>> Hi Folks,
>>
>> I work with kea 1.6.1
>>
>> I really do not understand the concept or at leased the documentation
>> regarding shared-networks.
>> Do i need shared-networks or not?
>> I do not have the problem that I have networks that grew out of there
>> original definition.
>>
>> https://kea.readthedocs.io/en/latest/arm/dhcp4-srv.html
>>
>> lets say i have 50+ subnet4 that will ask the kea dhcp server over dhcp
>> relayhosts (a swtich).
>>
>> All these subnet4 will hold only server that have a IP-reservation.
>>
>> Do i need multi shard networks?
>> Can or do i have to put these 50+ networks in multi shared networks?
>> Do i have to use different interfaces  for each shared network?
>>
>> I would be very thankful for some enlightenment.
>>
>> Best
>> Giso
>>
>
> "Shared networks" are layer 3 subnets in the same layer 2 broadcast domain
> (physical wire or VLAN).  If the same router port has multiple subnets on
> it, and they are not 'tagged' differently, then they are "shared
> networks".  Otherwise, they are not shared.
> Does that help?
>
> --
> Bob Harold
>
>
> --
> Giso Kegel
>
> Systems Engineer
> Internal Support & Services (IONOS Cloud)
>
> 1&1 IONOS SE | Greifswalder Str. 207 | 10405 Berlin | Germany
> Phone:
> E-Mail: giso.kegel at cloud.ionos.com | Web: www.ionos.de
>
> Hauptsitz Montabaur, Amtsgericht Montabaur, HRB 24498
>
> Vorstand: Dr. Christian Böing, Hüseyin Dogan, Dr. Martin Endreß, Hans-Henning Kettler, Matthias Steinberg, Achim Weiß
> Aufsichtsratsvorsitzender: Markus Kadelke
>
>
> Member of United Internet
>
> Diese E-Mail kann vertrauliche und/oder gesetzlich geschützte Informationen enthalten. Wenn Sie nicht der bestimmungsgemäße Adressat sind oder diese E-Mail irrtümlich erhalten haben, unterrichten Sie bitte den Absender und vernichten Sie diese E-Mail. Anderen als dem bestimmungsgemäßen Adressaten ist untersagt, diese E-Mail zu speichern, weiterzuleiten oder ihren Inhalt auf welche Weise auch immer zu verwenden.
>
> This e-mail may contain confidential and/or privileged information. If you are not the intended recipient of this e-mail, you are hereby notified that saving, distribution or use of the content of this e-mail in any way is prohibited. If you have received this e-mail in error, please notify the sender and delete the e-mail.
>
> _______________________________________________
> Kea-users mailing list
> Kea-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/kea-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/kea-users/attachments/20200311/43f041eb/attachment.htm>