[Kea-users] Question regarding to kea configuration in memory
tachibanashita at outlook.com
tachibanashita at outlook.com
Wed Apr 23 12:50:14 UTC 2025
I have unicast the modified config file to your email.
Thanks,
> On Apr 22, 2025, at 10:34 AM, Darren Ankney <darren.ankney at gmail.com> wrote:
>
> Hi,
>
> I am not able to reproduce this behavior. Please can you share your
> entire "Before config-write" Kea configuration? Please redact any
> sensitive items.
>
> Thank you,
> Darren Ankney
>
> On Mon, Apr 21, 2025 at 9:45 AM tachibanashita at outlook.com
> <tachibanashita at outlook.com> wrote:
>>
>> Hi Darren,
>>
>> I am using the latest dev Kea 2.7.7 version with RHEL9, the package for dhcp6 is isc-kea-dhcp6-2.7.7-isc20250326114722.el9.x86_64.rpm. Here’re my definition on the “device” class. I only have this client class defined, don’t have the “device_class2” client class in definition. And I am using client-classes so that part is expected.
>>
>>
>> {
>> "Dhcp6": {
>> "allocator": "iterative",
>> "calculate-tee-times": true,
>> "client-classes": [
>> {
>> "name": “device",
>> "option-data": [
>> {
>> "always-send": true,
>> "code": 34,
>> "csv-format": true,
>> "data": “xxxxxxxx",
>> "name": "syslog-servers",
>> "never-send": false,
>> "space": "vendor-4491"
>> },
>> {
>> "always-send": true,
>> "code": 37,
>> "csv-format": true,
>> "data": “xxxxxxxxx",
>> "name": "time-servers",
>> "never-send": false,
>> "space": "vendor-4491"
>> },
>> {
>> "always-send": true,
>> "code": 38,
>> "csv-format": true,
>> "data": "0",
>> "name": "time-offset",
>> "never-send": false,
>> "space": "vendor-4491"
>> },
>> {
>> "always-send": true,
>> "code": 61,
>> "csv-format": true,
>> "data": “xxxxx",
>> "name": "ccap-cores",
>> "never-send": false,
>> "space": "vendor-4491"
>> },
>> {
>> "always-send": true,
>> "code": 17,
>> "csv-format": false,
>> "data": "",
>> "name": "vendor-opts",
>> "never-send": false,
>> "space": "vendor-4491"
>> }
>> ],
>> "test": "substring(option[17].option[2].hex,0,3) == ‘device'"
>> }
>> ],
>>
>>
>>
>>
>> On Apr 19, 2025, at 6:19 AM, Darren Ankney <darren.ankney at gmail.com> wrote:
>>
>> Hi,
>>
>> Please share what version of Kea you are using. Not only did the
>> class name change, but the statement became a list (client-class vs
>> client-classes). Suspect you might be using a dev version as that
>> feature has not been released in stable. There could be some bug
>> there, though I am unsure why an _class2 would be added in this case.
>> Do you have a "device" or "device_class2" defined in client-classes
>> (not in the subnet but an actual class definition)?
>>
>> Thank you,
>> Darren Ankney
>>
>> On Thu, Apr 17, 2025 at 5:23 PM tachibanashita at outlook.com
>> <tachibanashita at outlook.com> wrote:
>>
>>
>> Greetings,
>>
>> I have a subnet definition in my kea-dhcp6.conf, it inherited its configuration from a client class called “device”, then I gave it some customization configuration in the option-data section. After I used the config-write command to get the config from memory, I noticed the client class of this subbed is no longer “device” but “device_class2”, even I never defined this client class. My guess is because of the customization data in option-data section, so kea realized its configuration is different from the original client class “device”, and it gives a new name.
>>
>> Is this behavior expected? I think this could bring some troubles when we try to do automatization. Now after we use the subnet hook, we have to use the config-write command Darren mentioned to save the config changes from memory to harddisk. And now in the new config file, we will have those “device_class2” client class which previously didn’t exist.
>>
>>
>> Original config in kea-dhcp6.conf:
>>
>> {
>> "id": 2,
>> "subnet": "2100:100:10:10::1/64",
>> "option-data": [
>> {
>> "space": "vendor-4491",
>> "name": "cores",
>> "code": 61,
>> "data": "2100:100:10:10::10-2100:100:10:10::100",
>> "always-send": true
>> }
>> ],
>> "pools": [
>> {
>> "pool": "2100:100:10:10::10-2100:100:10:10::100"
>> }
>> ],
>> "relay": {
>> "ip-addresses": [ "2100:100:10:10::1" ]
>> },
>> "interface": "ens2",
>> "client-class": “device",
>> "allocator": "iterative"
>> },
>>
>>
>> After using config-write:
>> {
>> "allocator": "iterative",
>> "calculate-tee-times": true,
>> "client-classes": [ “device_class2" ],
>> "id": 2,
>> "interface": "ens2",
>> "max-preferred-lifetime": 907200,
>> "max-valid-lifetime": 1209600,
>> "min-preferred-lifetime": 907200,
>> "min-valid-lifetime": 1209600,
>> "option-data": [
>> {
>> "always-send": true,
>> "code": 61,
>> "csv-format": true,
>> "data": “2100:100:0:30:0:0:0:22",
>> "name": "cores",
>> "never-send": false,
>> "space": "vendor-4491"
>> }
>> ],
>> "pd-allocator": "iterative",
>> "pd-pools": [ ],
>> "pools": [
>> {
>> "option-data": [ ],
>> "pool": “2100:100:10:10::10-2100:100:10:10::100"
>> }
>> ],
>> "preferred-lifetime": 907200,
>> "rapid-commit": false,
>> "rebind-timer": 1058400,
>> "relay": {
>> "ip-addresses": [ "2100:100:10:10::1" ]
>> },
>> "renew-timer": 604800,
>> "reservations": [ ],
>> "store-extended-info": false,
>> "subnet": "2100:100:10:10::1/64",
>> "t1-percent": 0.5,
>> "t2-percent": 0.8,
>> "valid-lifetime": 1209600
>> },
>> --
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