[Kea-users] [EXTERNAL] Re: Two questions regarding to kea subnet configuration

[Xiao, Yu (CCI-Atlanta)]

Thank you, David, Dan! I missed it 😊



Best Regards,
Yu


From: Kea-users <kea-users-bounces at lists.isc.org> on behalf of David Farje <davidabelfarje at gmail.com>
Date: Monday, May 6, 2024 at 12:13 PM
To: Kea user's list <kea-users at lists.isc.org>
Subject: [EXTERNAL] Re: [Kea-users] Two questions regarding to kea subnet configuration
Definitely string ID is nicer to manage.  The thing is, Kea seems to be designed to support a large number of subnets and DB backend.  In this case it is better to use an integer because I don't think you want a string based primary key on a DB table with millions of entries.

Regarding your second question I believe you may find some answers here:
https://kea.readthedocs.io/en/kea-2.4.0/arm/dhcp4-srv.html#address-allocation-strategies-in-dhcpv4<https://urldefense.com/v3/__https:/kea.readthedocs.io/en/kea-2.4.0/arm/dhcp4-srv.html*address-allocation-strategies-in-dhcpv4__;Iw!!Hit2Ag!xveYbOF4SxD_yTFDgWXmMsqPjCqOx_bFWSTyM2qY5umOFDia9g8u05UL97yAOd-fcyJfJH79fWVwopa8h24qdw$>

Regards,
David


On Mon, May 6, 2024 at 9:21 AM <mxhajduczenia at gmail.com<mailto:mxhajduczenia at gmail.com>> wrote:
I can confirm – the lack of support for string ID is pretty annoying right now, and forces me to create ranges for specific applications, which will not scale well in production.

On the second one, I observed that it goes numerically from the bottom of the pool range up, so ::2, ::3, etc. In ISC, it seems to have been random selection from the pool, with attempt made to populate all stanzas. Kea seems to prefer numerically incrementing assignment, which is pretty bad for security purposes (if a user knows it, they can pretty much guess previous assignments). I preferred personally the old ISC way of doing things.

Marek

From: Kea-users <kea-users-bounces at lists.isc.org<mailto:kea-users-bounces at lists.isc.org>> On Behalf Of Xiao, Yu (CCI-Atlanta) via Kea-users
Sent: Monday, May 6, 2024 6:10 AM
To: Kea user's list <kea-users at lists.isc.org<mailto:kea-users at lists.isc.org>>
Cc: Xiao, Yu (CCI-Atlanta) <yu.xiao at cox.com<mailto:yu.xiao at cox.com>>
Subject: [Kea-users] Two questions regarding to kea subnet configuration

Greetings,

I have two questions related to the kea design. First, seems currently we can only assign numeric IDs to subnets, but for subnet management, it’s more convenient to use a string, is it possible to add this feature? Second, how kea design to distribute the ip addresses inside of the subnet esp ipv6 subnet? Is it totally random? Thank you.




Best Regards,
Yu

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