[Kea-users] [Kea] subnet or shared network selected for multiple relays

[Marcin Siodelski]

Yup, that's what I'd do.

Marcin

On 27.11.2017 09:52, Chaigneau, Nicolas wrote:
>
> Thanks Marcin.
>
>
> So I guess a hook would be the next best way to do that.
>
> Something configured like:
>
> "Dhcp4": {
>     :
>     "hooks-libraries": [
>         {
>             "library": "/opt/local/multi-relay-subnets.so",
>             "parameters": {
>                 "relay-subnets": [
>                     {
>                         "subnet": "192.0.2.0/26",
>                         "relays": [ "192.1.1.1", "192.2.2.2" ]
>                     },
>                     {
>                         "subnet": "...",
>                         "relays": [ ... ]
>                     }
>                 ]
>             }
>         }
>     ]
> }
>
> A hook "subnet4_select" which would:
> - loop over the hook parameter "relay-subnets" to find a suitable entry for the received giaddr,
> - and then loop over Kea "subnet4collection" to retrieve the subnet we want,
> - and set that in the callout argument "subnet4".
>
> I've seen something similar discussed on the mailing list:
>
> https://www.mail-archive.com/kea-users@lists.isc.org/msg00214.html
>
>
>
> Regards,
> Nicolas.
>
>
> >
> > Unfortunately, it isn't possible for the shared networks too. The shared
> > network pretty much derives parameters from the subnet. Or, maybe I
> > should say a subnet derives from the shared network.
> >
> > Marcin Siodelski
> > ISC
> >
> > On 24.11.2017 18:46, Chaigneau, Nicolas wrote:
> >> Hello,
> >>
> >>  
> >>
> >>  
> >>
> >> I would like to configure a subnet shared by multiple relays, i.e. that
> >> would be chosen for several "giaddr" values.
> >>
> >> If I'm not mistaken, this was not possible with the basic "subnet4"
> >> configuration prior to 1.3.0 (as parameter "relay" does not support a
> >> list of relays).
> >>
> >>  
> >>
> >> Can I achieve that with a shared network in 1.3.0 ?
> >>
> >>  
> >>
> >> I've read Kea admin guide but I'm not sure this is possible just with
> >> configuration.
> >>
> >> I have the impression that "relay" still can only be one element, either
> >> for the "shared-networks" or for each of its "subnet4" components.
> >>
> >>  
> >>
> >>  
> >>
> >>  
> >>
> >> Regards,
> >>
> >> Nicolas.
> >>
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>