[Kea-users] One question on the subnet configuration

[Bob Harold]

On Tue, Jul 16, 2024 at 5:11 PM Xiao, Yu (CCI-Atlanta) via Kea-users <
kea-users at lists.isc.org> wrote:

> Hi experts,
>
>
>
> I configured two client classes for my test RPDs. And I also configured
> three subnets for three different RPDs. I found that even in the subnet
> configuration, I have correlated the client-class “RPD_new” for that
> subnet 3 to use. But in reality, kea just ignored this configuration, and
> use the client class “RPD” for all 3 subnets. And because my test RPDs
> satisfied both “RPD” and “RPD_new” client classes, and my test RPD used the
> configurations in “RPD” instead of “RPD_new”.
>

My guess is that the order matters, and it takes the first match.
Your first class matches any client class where the first three characters
are "RPD", so it matches both "RPD" and "RPD_new".
You might try putting the RPD_new class first, so it has a chance of
matching a client before the RDP class matches.

-- 
Bob Harold


>
>
> Why the configuration “client-class” under “subnet6” won’t take effective
> as I thought?
>
>
>
>     "client-classes": [
>
>         {
>
>             "name": "RPD",
>
>             "test": "substring(option[17].option[2].hex,0,3) == 'RPD'",
>
>             "option-data": [
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "syslog-servers",
>
>                     "code": 34,
>
>                     "data": "2000:109:20:3100:10:0:252:23",
>
>                     "always-send": true
>
>                 },
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "time-servers",
>
>                     "code": 37,
>
>                     "data": "2000:109:20:3100::37",
>
>                     "always-send": true
>
>                 },
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "time-offset",
>
>                     "code": 38,
>
>                     "data": "0",
>
>                     "always-send": true
>
>                 },
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "ccap-cores",
>
>                     "code": 61,
>
>                     "data": "2000:109:20:3100:10:0:254:34",
>
>                     "always-send": true
>
>                 },
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "vendor-opts",
>
>                     "code": 17,
>
>                     "always-send": true
>
>                 }
>
>             ]
>
>         },
>
>         {
>
>             "name": "RPD_new",
>
>             "test": "substring(option[1].hex,0,9) == 0x000400001010D22BC9",
>
>             "option-data": [
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "syslog-servers",
>
>                     "code": 34,
>
>                     "data": "2000:109:20:3100:10:0:252:1",
>
>                     "always-send": true
>
>                 },
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "time-servers",
>
>                     "code": 37,
>
>                     "data": "2000:109:20:3100::9",
>
>                     "always-send": true
>
>                 },
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "time-offset",
>
>                     "code": 38,
>
>                     "data": "0",
>
>                     "always-send": true
>
>                 },
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "ccap-cores",
>
>                     "code": 61,
>
>                     "data": "2000:109:20:3100:0:0:0:4",
>
>                     "always-send": true
>
>                 },
>
>                 {
>
>                     "space": "vendor-4491",
>
>                     "name": "vendor-opts",
>
>                     "code": 17,
>
>                     "always-send": true
>
>                 }
>
>             ]
>
>         }
>
>     ],
>
> # Finally, we list the subnets from which we will be leasing addresses.
>
>     "subnet6": [
>
>         {
>
>             "id": 1,
>
>             "subnet": "2000:109:20:3110::1/64",
>
>             "pools": [
>
>                 {
>
>                     "pool": "2000:109:20:3110::1-2000:109:20:3110::10"
>
>                 }
>
>              ],
>
>             "relay": {
>
>                 "ip-addresses": [ "2000:109:20:3110::1" ]
>
>              },
>
>             "interface": "ens18",
>
>             "client-class": "RPD",
>
>             "allocator": "iterative"
>
>         },
>
>         {
>
>             "id": 2,
>
>             "subnet": "2000:109:20:5320::1/64",
>
>             "pools": [
>
>                 {
>
>                     "pool": "2000:109:20: 5320::1-2000:109:20: 5320::10"
>
>                 }
>
>              ],
>
>             "relay": {
>
>                 "ip-addresses": [ "2000:109:20: 5320::1" ]
>
>              },
>
>             "interface": "ens18",
>
>             "client-class": "RPD",
>
>             "allocator": "iterative"
>
>         },
>
>         {
>
>             "id": 3,
>
>             "subnet": "2000:109:20:2110::1/64",
>
>             "pools": [
>
>                 {
>
>                     "pool": "2000:109:20: 2110::1-2000:109:20: 2110::9"
>
>                 }
>
>              ],
>
>             "relay": {
>
>                 "ip-addresses": [ "2000:109:20: 2110::1" ]
>
>              },
>
>             "interface": "ens18",
>
>             "client-class": "RPD_new",
>
>             "allocator": "iterative"
>
>         }
>
>     ],
>
>
>
>
>
>
>
> Best Regards,
>
> Yu
>
>
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