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",
            "parameters": { }
        },
        {
            "library": "/usr/lib/kea/hooks/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",

            "parameters": { }

        },

        {

            "library": "/usr/lib/kea/hooks/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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