DHCPv6: is it possible to have a fixed prefix delegation for a host while allowing the IPv6 address assigned to be dynamic?

[Erik Andersen]

I would like to hand out static DHCPv6 prefix delegations to hosts based
on their client-id.

I currently have a system of include files that includes on file for
each host.

Those files have something like:

host 3c906af6703a {
         host-identifier option dhcp6.client-id
00:03:00:01:3c:90:6a:f6:70:3c;
         fixed-prefix6 2607:f248:320:130::/60;
}

They are included in part of a pool6 in a subnet6:


         pool6 { # For normal/WAN clients, not DOCSIS
                 allow unknown-clients;
                 deny members of "docsis";

                 # Range for clients
                 range6 2607:f248:102:10::10 2607:f248:102:10::ffff;

                 # Range for clients requesting a temporary address
                 range6 2607:f248:102:10::2:0/112 temporary;

                 # Include static prefix delegations
                 include "/etc/dhcp/staticpdinclude.conf";
         }

But when a client is requesting a non-temporary address and a prefix
(and is covered by a host definition), the response packet says there is
no available address, and the log shows:

Unable to pick client address: no addresses available  - shared network
2607:f248:102:10::/64: 0 total, 0 active,  0 abandoned

Why wouldn't the host directive inherit the range6 definition and use
something from that range?

Is it possible to have a dynamically picked non-temporary address
assigned to a client, along with a fixed delagated prefix? If so, can
someone share an example configuration that does that?

Thanks,

Erik


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[perl-list]

Erik,

This works fine for me.  The only difference I see is that I have a range6 defined that would include the static and i'm not using include.  Try a test not using include and see if it works for you.

---

From: "Erik Andersen" <[hidden email]>
To: "Users of ISC DHCP" <[hidden email]>
Sent: Wednesday, May 30, 2018 1:00:00 AM
Subject: DHCPv6: is it possible to have a fixed prefix delegation for a host while allowing the IPv6 address assigned to be dynamic?

I would like to hand out static DHCPv6 prefix delegations to hosts based
on their client-id.

I currently have a system of include files that includes on file for
each host.

Those files have something like:

host 3c906af6703a {
         host-identifier option dhcp6.client-id
00:03:00:01:3c:90:6a:f6:70:3c;
         fixed-prefix6 2607:f248:320:130::/60;
}

They are included in part of a pool6 in a subnet6:


         pool6 { # For normal/WAN clients, not DOCSIS
                 allow unknown-clients;
                 deny members of "docsis";

                 # Range for clients
                 range6 2607:f248:102:10::10 2607:f248:102:10::ffff;

                 # Range for clients requesting a temporary address
                 range6 2607:f248:102:10::2:0/112 temporary;

                 # Include static prefix delegations
                 include "/etc/dhcp/staticpdinclude.conf";
         }

But when a client is requesting a non-temporary address and a prefix
(and is covered by a host definition), the response packet says there is
no available address, and the log shows:

Unable to pick client address: no addresses available  - shared network
2607:f248:102:10::/64: 0 total, 0 active,  0 abandoned

Why wouldn't the host directive inherit the range6 definition and use
something from that range?

Is it possible to have a dynamically picked non-temporary address
assigned to a client, along with a fixed delagated prefix? If so, can
someone share an example configuration that does that?

Thanks,

Erik


_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users

_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users