problem with dhcp setup

[John Jason Brzozowski (CISSP, RHCT)]

See below.

John


On 6/12/07 6:27 AM, "Shane Kerr" <Shane_Kerr at isc.org> wrote:

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> Suprasad Mutalik Desai wrote:
>> Hi all ,
>> 
>>    I am new to DHCP .I am using dhcp-4.0.0a1 version and i have
>> complied it for IPv6 .i have 2 host m/c .
>> In host1, i executed dhcpd -6 /etc/dhcpd.conf
>> dhcpd.conf ----
>> 
>> subnet6 fec0:3::/64{
>> range6 fec0:3::100/64;
>> option domain-name "example.org";
>> option domain-name-servers 10.1.1.200;
>> allow unknown-clients;
>> }
>> 
>> and in host2 , i executed dhclient -6 /etc/dhclient.conf
>> 
>> /etc/dhclient.conf ---
>> 
>>  interface "eth1"{
>>  send dhcp6.oro 1, 2, 7, 12, 13, 23, 24, 39;
>> request domain-name, domain-name-servers, host-name;
>> }
>> 
>> i get an IPv6 address configured on host2 (IPv6 address is random as
>> this version has some problem with range6).but i dont get domain-name
>> and domain-name-servers configured .
>> 
>> pls guide me . is there anything i need to add in configuration file ?
> 
> DHCPv6 has a different option space that DHCP for IPv4. You probably want
> something like:
> 
> subnet6 fec0:3::/64 {
> range6 fec0:3:0::100/128;
> option dhcp6.domain-search "example.org";
> option dhcp6.name-servers f3c0:3::101;
> allow unknown-clients;
> }
> 
> Note that you there is no way to set an IPv4 DNS server using DHCPv6. I guess
> the idea is that you should use existing IPv4 mechanisms to do that.
[jjmb] This is correct, to the best of my knowledge there is no mechanism
specified for core DHCPv6 to set IPv4 configuration information.  So this is
currently not valid.
> 
> About the range6: you probably wanted to specify /128 rather than /64. We
> should
> probably make it an error if you specify an invalid network (like 1:2:3:4::/8
> or
> something). I'll try to get this fixed for 4.0.0a2 also.
[jjmb] So a range6 using a /128 would allow for the assignment of a single
IPv6 address?  I do not believe this should be limited to a /128, in fact,
it should allow for variable prefix lengths.
> 
> - --
> Shane
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===============================================
John Jason Brzozowski (CISSP, RHCT)
jjmb at jjmb.com
(p) 484-994-6787
(f) 610-616-4535
===============================================