Xiao,
This is actually exactly why we implemented HA instead of DHCPv4 failover! So
that you can use the same mechanism for DHCPv6.
I am sorry if the documentation was misleading at all, I think the
documentation focuses on DHCPv4 because that is what most people are using.
Vicky
> On Feb 29, 2024, at 4:04 PM, Xiao, Yu (CCI-Atlanta) via Kea-users
> <kea-users@lists.isc.org> wrote:
>
> Greetings,
>
> I have an interesting question for you esp for ISC developers. I want to only
> use kea-dhcp6, which means I need VMs working as DHCP servers to provide IPv6
> addresses to other devices so those clients can have IPv6 addresses. But I
> don’t care or need that my kea-dhcp6 servers themselves have IPv6 addresses
> or not.
>
> But the problem is that in the documentation, I can see they give some
> examples which all put the redundancy configurations under the Dhcp4
> configuration section. Does it imply that in order to use the HA feature for
> kea-dhcp6 servers, my DHCP servers themselves must be configured to have
> their own IPv6 addresses? I don’t think this makes any sense since in reality
> we only need the connectivity between primary and secondary servers no matter
> this connectivity is based on IPv4 or IPv6.
>
> "Dhcp4": {
> "hooks-libraries": [
> {
> "library": "/usr/lib/kea/hooks/libdhcp_lease_cmds.so
> <http://libdhcp_lease_cmds.so/>",
> "parameters": { }
> },
> {
> "library": "/usr/lib/kea/hooks/libdhcp_ha.so
> <http://libdhcp_ha.so/>",
> "parameters": {
> "high-availability": [ {
> "this-server-name": "server1",
> "mode": "load-balancing",
> "peers": [
> {
> "name": "server1",
> "url": http://192.168.56.33:8000/,
> "role": "primary"
> },
> {
> "name": "server2",
> "url": http://192.168.56.66:8000/,
> "role": "secondary"
> }
> ],
> "state-machine": {
> "states": [
> {
> "state": "waiting",
> "pause": "once"
> }
> ]
> }
> } ]
> }
> }
> ],
> ...
> }
>
> May I ask can I configure my servers like this?
>
> "Dhcp6": {
> "hooks-libraries": [
> {
> "library": "/usr/lib/kea/hooks/libdhcp_lease_cmds.so
> <http://libdhcp_lease_cmds.so/>",
> "parameters": { }
> },
> {
> "library": "/usr/lib/kea/hooks/libdhcp_ha.so
> <http://libdhcp_ha.so/>",
> "parameters": {
> "high-availability": [ {
> "this-server-name": "server1",
> "mode": "load-balancing",
> "peers": [
> {
> "name": "server1",
> "url": http://192.168.56.33:8000/,
> "role": "primary"
> },
> {
> "name": "server2",
> "url": http://192.168.56.66:8000/,
> "role": "secondary"
> }
> ],
> "state-machine": {
> "states": [
> {
> "state": "waiting",
> "pause": "once"
> }
> ]
> }
> } ]
> }
> }
> ],
> ...
> }
>
>
>
> Related section:
> https://downloads.isc.org/isc/kea/2.5.5/doc/html/arm/hooks.html#hooks-high-availability
>
>
>
>
> Best Regards,
> Yu
>
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