problem with dhcp setup

Suprasad Mutalik Desai suprasad.desai at gmail.com
Thu Jun 14 03:43:55 UTC 2007


I understand about using prefix /128 in the dhcp-4.0.0a1 version , but
wat u said is
same as using fixed-address6 . with the prefix /64 i get a random IPv6
address assigned to my host . Is there any addressing mechanism behind
it ?

On 6/14/07, John Jason Brzozowski (CISSP, RHCT) <jjmb at jjmb.com> wrote:
> See below.
>
> John
>
>
> On 6/12/07 6:27 AM, "Shane Kerr" <Shane_Kerr at isc.org> wrote:
>
> > -----BEGIN PGP SIGNED MESSAGE-----
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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
> ===============================================
>
>
>
>


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