adding our team to CC (sorry) On Tue, Sep 12, 2023 at 11:20 AM Furkan Sahin <fur...@ubicloud.com> wrote:
> Hello Kea Users, > > We've been using Dnsmasq to serve as our DNS cache, for router > advertisement, and for DHCP functionalities. As Dnsmasq lacks support for > prefix delegation, and we aim to serve both private and public IPv6 > prefixes, we are transitioning to a combination of Dnsmasq, radvd, and the > Kea DHCP server. > > For the time being, we are focusing solely on assigning individual > addresses with Kea, as we recognize that handling prefix delegation is more > complex and currently unsupported by Netplan. This move is in preparation > for future enhancements. > > Our key concern lies in the differing behavior between Dnsmasq and Kea in > handling multiple IP assignments to the same client. In our setup, a single > interface is configured with both a public and a private IPv6 prefix. When > a DHCPv6 SOLICIT message is received, Dnsmasq automatically assigns > multiple IP addresses based on the multiple dhcp-ranges configured for the > interface. Kea, however, appears to assign only one IP address, choosing > the subnet that is listed higher in the configuration. > > Is there a simpler way to achieve multiple IP assignments with Kea, > similar to how Dnsmasq handles it? Is this a feature that could potentially > be implemented in future releases of Kea? > > Additional Context on Our Setup: > > We are utilizing Cloud-Hypervisor to run VMs on a single server, with each > VM isolated within its own network namespace. > Each VM is managed by its own instance of Dnsmasq, radvd, > kea-dhcp4-server, and kea-dhcp6-server. > The VMs operate on Ubuntu 22.04 and utilize Netplan and systemd-networkd > for network management. > For further clarity, you can review my Pull Request that outlines our > work: Ubicloud PR #564 > <https://github.com/ubicloud/ubicloud/pull/564/files#diff-c6f8b9419dfcf78ddc49be4e9515803f05a8fd2959463f39c5b9bcc6b9ff0ba0R370> > . > > Your insights would be invaluable to us. Thank you in advance! > > Best regards, > Furkan >
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