Set up DHCP server IPv6 on Ubuntu 14.04

Mon Dec 5 09:26:44 UTC 2016

Hi Niall,

After I use this dhcpd6.conf, the homeware(it's a router actually) always
obtain the IP 2011:1:2:2::1, may I ask do you know how to refine the
dhcpd6.conf to make it obtain the IP such as 2011:1:2:2::7?

*default-lease-time 640;max-lease-time 700;log-facility local7;subnet6
2011:1:2::/48 {        # Range for clients        range6 2011:1:2::111
2011:1:2::234;        # Additional options        option dhcp6.name-servers
2011:1:2::2012;        option dhcp6.domain-search "ipv6.domain.example";
    # Prefix range for delegation to sub-routers          prefix6
2011:1:2:2:: 2011:1:2:2:: /64;       # Example for a fixed host address
    host specialclient {                host-identifier option
dhcp6.client-id 00:01:00:01:4a:1f:ba:e3:60:b9:1f:01:23:45;
fixed-address6 2011:1:2::110;        }}*

Thanks,
Reed

On Mon, Dec 5, 2016 at 10:18 AM, Reed Xia <huaqin2005 at gmail.com> wrote:

> Hi Niall,
>
> Yes I mean 2001::7. Thanks for help point out the problem! I learn that
> it need IPv6 prefix, I referred to a dhcpd6.conf from Internet and looked
> it worked.
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> *default-lease-time 640;max-lease-time 700;log-facility local7;subnet6
> 2011:1:2::/48 {        # Range for clients        range6 2011:1:2::111
> 2011:1:2::234;        # Additional options        option dhcp6.name-servers
> 2011:1:2::2012;        option dhcp6.domain-search
> "ipv6.domain.example";        # Prefix range for delegation to
> sub-routers          prefix6 2011:1:2:2:: 2011:1:2:2:: /64;       # Example
> for a fixed host address        host specialclient {
> host-identifier option dhcp6.client-id
> 00:01:00:01:4a:1f:ba:e3:60:b9:1f:01:23:45;                fixed-address6
> 2011:1:2::110;        }}*
>
>
> *root at reed-Lenovo:/etc/dhcp# /root/dhcp-4.3.4/server/dhcpd -6 -d -cf
> /etc/dhcp/dhcpd6.conf eth0Internet Systems Consortium DHCP Server
> 4.3.4Copyright 2004-2016 Internet Systems Consortium.All rights
> reserved.For info, please visit https://www.isc.org/software/dhcp/
> <https://www.isc.org/software/dhcp/>WARNING: Host declarations are global.
> They are not limited to the scope you declared them in.Config file:
> /etc/dhcp/dhcpd6.confDatabase file: /var/db/dhcpd6.leasesPID file:
> /var/run/dhcpd6.pidWrote 0 deleted host decls to leases file.Wrote 0 new
> dynamic host decls to leases file.Wrote 0 NA, 0 TA, 1 PD leases to lease
> file.Bound to *:547Listening on Socket/5/eth0/2011:1:2::/48Sending on
> Socket/5/eth0/2011:1:2::/48Server starting service.Solicit message from
> fe80::3291:8fff:fe05:bf86 port 546, transaction ID 0xF5FFA00Advertise PD:
> address 2011:1:2:2::/64 to client with duid 00:03:00:01:30:91:8f:05:bf:86
> iaid = 1 valid for 640 secondsSending Advertise to
> fe80::3291:8fff:fe05:bf86 port 546Request message from
> fe80::3291:8fff:fe05:bf86 port 546, transaction ID 0x936B200Reply PD:
> address 2011:1:2:2::/64 to client with duid 00:03:00:01:30:91:8f:05:bf:86
> iaid = 1 valid for 640 secondsSending Reply to fe80::3291:8fff:fe05:bf86
> port 546*
> Thanks,
> Reed
>
> On Thu, Dec 1, 2016 at 6:31 PM, Niall O'Reilly <niall.oreilly at ucd.ie>
> wrote:
>
>> On 1 Dec 2016, at 9:47, Reed Xia wrote:
>>
>> I have a Ubuntu 14.04 with 2 Ethernet adapters(eth0 and eth1), eth0 is
>>> connected to an homeware device, I need set up DHCP IPv6 service against
>>> eth0(I set the IPv6 address for eth0 as 2007::7/64 in Ubuntu),
>>>
>>
>>   Perhaps you mean 2001::7 (mentioned in the configuration fragment you
>> sent) ?
>>
>> and I want the homeware to obtain a fixed IPv6 address(2001::10),
>>>
>>
>>   2001::/32 is reserved for a specific purpose (see
>> https://www.iana.org/assignments/iana-ipv6-special-registry/
>> iana-ipv6-special-registry.xhtml).  Re-using part of this address space
>> for your own, private
>> purpose is likely to cause trouble for you or others.
>>
>>   You should not do this.
>>
>>   If you have not been assigned a global address prefix, you should
>> consider using a Unique
>>   Local IPv6 prefix (see https://tools.ietf.org/html/rfc4193).
>>
>> so I did it in following way, now the problem is the homeware always
>>> cannot get IPv6, I can see message "Unable to pick client prefix: no IPv6
>>> pools on this shared network" from dhcpd service, I guess the dhcpd6.conf
>>> have some problem, can you please help figure out?
>>>
>>
>>   The message is telling you that a 'pool6' specification is expected.
>> It is clear from
>>   the man-page that this is allowed, but NOT clear that it is required.
>> I'ld suggest
>>   trying the following where you currently have just a 'range6'
>> specification:
>>
>>   pool6 {
>>     range6 ...
>>   }
>>
>>   Best regards,
>>
>>   Niall O'Reilly
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
>
>
>
> --
> Thanks,
> - Reed
>

-- 
Thanks,
- Reed
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