[Kea-users] [EXTERNAL] Re: Some questions on client class configuration
Xiao, Yu (CCI-Atlanta)
yu.xiao at cox.com
Tue Jan 14 15:42:17 UTC 2025
Hi Darren,
Thank you for the quick response and clarifications! I see the stable version for option-class-tagging will be 3.0.0 per previous mail, how about the ‘client-classes’ feature? Will it be the same?
Best Regards,
Yu
From: Darren Ankney <darren.ankney at gmail.com>
Date: Tuesday, January 14, 2025 at 9:56 AM
To: Kea user's list <kea-users at lists.isc.org>
Cc: Xiao, Yu (CCI-Atlanta) <yu.xiao at cox.com>
Subject: [EXTERNAL] Re: [Kea-users] Some questions on client class configuration
Hello Yu,
There were three things changed that you have mentioned here. I'll
try to clarify theses.
- option-class-tagging
(https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fkea.readthedocs.io%2Fen%2Fkea-2.7.5%2Farm%2Fclassify.html%23option-class-tagging&data=05%7C02%7Cyu.xiao%40cox.com%7C13f3cc3e7ef34889359508dd34aba747%7C9feebc97ff0442c9a152767073872118%7C1%7C0%7C638724634039859910%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=HO0Ms2q8RsYqsewLVZpP3NYqa2kt3AoubgvLgdnBHII%3D&reserved=0<https://kea.readthedocs.io/en/kea-2.7.5/arm/classify.html#option-class-tagging>)
- This is a completely new feature that allows the use of a class
guard ("client-classes": [ <list> ]) inside of an option. This limits
the option availability to only those clients that are members of one
of the classes in the list.
- client-class -> client-classes - the former "client-class" is now
"client-classes" and is a list. This allows you, for example, to
allow members of more than one class to obtain an address from a pool.
No longer will you have to make meta-classes testing membership in
several other classes. For an example of this change, see:
https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fkea.readthedocs.io%2Fen%2Fkea-2.7.5%2Farm%2Fdhcp4-srv.html%23reserving-client-classes-in-dhcpv4&data=05%7C02%7Cyu.xiao%40cox.com%7C13f3cc3e7ef34889359508dd34aba747%7C9feebc97ff0442c9a152767073872118%7C1%7C0%7C638724634039884540%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=NTMvbu67AOdxcWF5BzW3XyYK1ZHoGxPQQzvfYPlGO70%3D&reserved=0<https://kea.readthedocs.io/en/kea-2.7.5/arm/dhcp4-srv.html#reserving-client-classes-in-dhcpv4>
- require-client-classes -> evaluate-additional-classes - This change
is merely a renaming to make it more clear what the functionality
actually does. The naming was unclear before and led to confusion
(see: https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fkea.readthedocs.io%2Fen%2Fkea-2.7.5%2Farm%2Fdhcp4-srv.html%23additional-classification&data=05%7C02%7Cyu.xiao%40cox.com%7C13f3cc3e7ef34889359508dd34aba747%7C9feebc97ff0442c9a152767073872118%7C1%7C0%7C638724634039901005%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=QAgXJHRPOtB3S6mqUZHHhJQPgrwIKxo31ZQLSf04nQM%3D&reserved=0)<https://kea.readthedocs.io/en/kea-2.7.5/arm/dhcp4-srv.html#additional-classification>
Thank you,
Darren Ankney
On Mon, Jan 13, 2025 at 3:00 PM Xiao, Yu (CCI-Atlanta) via Kea-users
<kea-users at lists.isc.org> wrote:
>
> Hi ISC team,
>
>
>
> Last year, during my testing, I found that we can configure one client class string to a subnet definition, but the configurations won’t be changed. Since then, I have seen some similar discussions. And there’s a new feature in 2.7.4 called Option Class-Tagging which allows us to give different subnets different specific configurations. Also, the keyword has been changed from "client-class" to "client-classes". It looks to me, now we can assign multiple client classes to one subnet. But I don’t know if this is just a placeholder for now, or it has already supported the “OR'ed list of classes”. Can you help clarify?
>
>
>
> And it also mentions that "client-class" will be changed to "require-client-class" in future versions. When will it be made to the next stable version? Thank you.
>
>
>
>
>
> "client-classes": [
>
> {
>
> "name": "RPD",
>
> "test": "substring(option[17].option[2].hex,0,3) == 'RPD'",
>
> "option-data": [
>
> …
>
> ]
>
> },
>
> {
>
> "name": "RPD_new",
>
> "test": "substring(option[1].hex,0,9) == 0x000200001011E42BC2",
>
> "option-data": [
>
> …
>
> ],
>
>
>
> "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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