Date: Mon, 18 Jan 2010 16:31:37 -0500 From: David Horn <dhorn2000@gmail.com> To: Brett Lee <Brett.Lee@sun.com> Cc: freebsd-net@freebsd.org Subject: Re: DHCP6 client Message-ID: <25ff90d61001181331n47953c03h1a1973cddc741ab5@mail.gmail.com> In-Reply-To: <4B5388DE.5030603@Sun.COM> References: <4B50F719.5040402@Sun.COM> <4B5388DE.5030603@Sun.COM>
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On Sun, Jan 17, 2010 at 5:02 PM, Brett Lee <Brett.Lee@sun.com> wrote:
> Brett Lee wrote:
>>
>> Hello -
>>
>> Am using FreeBSD 6.3 as a dhcp6 client, trying to get DDNSv6 operational
>> in this environment. =A0When I execute 'dhcp6c -d lnc0' from the command=
line,
>> the following messages are logged on the (ISC 4.1.0p1) DHCP6 server:
>>
>> Solicit message from fe80::20c:29ff:fef3:a5de port 546, transaction ID
>> 0xB3D95D
>> Unable to pick client prefix: no IPv6 prefix pools on this shared networ=
k
>> Sending Advertise to fe80::20c:29ff:fef3:a5de port 546
>>
>> Am confused by the message above, in particular the "prefix pools", as
>> this host obtains the "global address" prefix and configures both link l=
ocal
>> and global addresses via SLAAC. =A0Surely this can't be the same prefix.
>>
>> Equally confusing is that the Solaris hosts on this LAN have no problem
>> getting v6 addresses via this DHCP server, and there seems to be plenty =
of
>> free leases available.
>>
>> Does FreeBSD 6.3 DHCP6 client need a "prefix", or a "pool" of them to be
>> =A0delivered by the server? =A0Obviously I'm a little bit confused :) an=
d am
>> thinking the problem is with the dhcpd.conf file. =A0Hoping for some
>> clarification or direction. =A0Configs are below.
>>
>> Thanks for your guidance/suggestions! =A0-Brett
>>
>> Client:
>>
>> [root@freebsdvm ~]# ifconfig -a
>> lnc0: flags=3D108843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,NEEDSGIANT> =
mtu
>> 1500
>> =A0 =A0 =A0 =A0inet6 fe80::20c:29ff:fef3:a5de%lnc0 prefixlen 64 scopeid =
0x1
>> =A0 =A0 =A0 =A0inet 192.168.1.94 netmask 0xffffff00 broadcast 192.168.1.=
255
>> =A0 =A0 =A0 =A0inet6 2bad:0:564:1:20c:29ff:fef3:a5de prefixlen 64 autoco=
nf
>> =A0 =A0 =A0 =A0ether 00:0c:29:f3:a5:de
>> plip0: flags=3D108810<POINTOPOINT,SIMPLEX,MULTICAST,NEEDSGIANT> mtu 1500
>> lo0: flags=3D8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
>> =A0 =A0 =A0 =A0inet6 ::1 prefixlen 128
>> =A0 =A0 =A0 =A0inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
>> =A0 =A0 =A0 =A0inet 127.0.0.1 netmask 0xff000000
>> [root@freebsdvm ~]# grep -v '#' /usr/local/etc/dhcp6c.conf
>> interface lnc0 {
>> =A0 =A0 =A0 =A0send ia-pd 0;
>> };
>> id-assoc pd {
>> =A0 =A0 =A0 =A0prefix-interface lnc0 {
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0sla-id 1;
>> =A0 =A0 =A0 =A0};
>> };
>> [root@freebsdvm ~]#
>>
>> Server:
>>
>> [root@solaris10u4sparc named]# grep iaaddr /var/db/dhcpd6.leases | sort =
|
>> uniq
>> =A0iaaddr 2bad:0:564:1::12 {
>> =A0iaaddr 2bad:0:564:1::18 {
>> =A0iaaddr 2bad:0:564:1::19 {
>> =A0iaaddr 2bad:0:564:2::18 {
>> =A0iaaddr 2bad:0:564:2::19 {
>> =A0iaaddr 2bad:0:564:3::18 {
>> [root@solaris10u4sparc named]# grep -v '#' /etc/dhcpd.conf | egrep
>> '[A-Z]|[a-z]|[0-9]'
>> authoritative;
>> include "/etc/rndc.key";
>> ddns-update-style =A0 =A0 =A0 interim;
>> ddns-domainname =A0 =A0 =A0 =A0 "ipv6.apevt.local";
>> ddns-rev-domainname =A0 =A0 "in-addr.arpa";
>> ignore =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0client-updates;
>> zone ipv6.apevt.local. {
>> =A0 =A0 =A0 =A0primary 192.168.1.23;
>> =A0 =A0 =A0 =A0key "rndc-key";
>> log-facility local6;
>> min-lease-time 60;
>> default-lease-time 3600;
>> max-lease-time 43200;
>> option domain-name "ipv6.apevt.local";
>> option domain-name-servers 192.168.1.254, 192.168.1.23;
>> option dhcp.domain-search "ipv6.apevt.local, apevt.local";
>> option dhcp6.domain-search "ipv6.apevt.local, apevt.local";
>> option dhcp6.name-servers 2bad:0:564:1:203:baff:fee8:36f2,
>> 2bad:0:564:2:203:baff:fee8:36f3, 2bad:0:564:3:203:baff:fee8:36f4;
>> subnet6 2bad:0000:0564:0001::/64 {
>> =A0 allow unknown-clients;
>> =A0 min-lease-time 60;
>> =A0 default-lease-time 60;
>> =A0 max-lease-time 60;
>> =A0 range6 2bad:0000:0564:0001::10 2bad:0000:0564:0001::19;
>> subnet6 2bad:0000:0564:0002::/64 {
>> =A0 allow unknown-clients;
>> =A0 min-lease-time 60;
>> =A0 default-lease-time 60;
>> =A0 max-lease-time 60;
>> =A0 range6 2bad:0000:0564:0002::10 2bad:0000:0564:0002::19;
>> subnet6 =A02bad:0000:0564:0003::/64 {
>> =A0 allow unknown-clients;
>> =A0 min-lease-time 60;
>> =A0 default-lease-time 60;
>> =A0 max-lease-time 60;
>> =A0 range6 2bad:0000:0564:0003::10 2bad:0000:0564:0003::19;
>> [root@solaris10u4sparc named]#
>>
>
> Seems I misconfigured dhcp6c.conf to request a pool of addresses for
> delivery downstream instead of a single stateful address. =A0Now using th=
e
> current FreeBSD, 8.0-RELEASE, with dhcp6c.conf setup as seen below:
>
> interface le0 {
> =A0 =A0 =A0 =A0send ia-na 0; =A0 =A0 =A0 =A0 =A0 # request stateful addre=
ss
> =A0 =A0 =A0 =A0request domain-name;
> =A0 =A0 =A0 =A0request domain-name-servers;
> }
> id-assoc na 0 {
> }
>
> It works. =A0On to DDNSv6. =A0-Brett
>
The dhcp6c client is the wide-dhcpv6 client (I am guessing you
installed from port net/dhcp6). If you are trying to do ddnsv6 using
dhcpv6, you might have better luck with using the ISC dhcpv6 client at
the same patchlevel as the server. (You will need to compile on your
own, as ISC 4.1 dhcp does not seem to be in the freebsd ports
collection at this time).
In my own testing, I also needed to tell dhclient (ISC variant)'s
dhclient-script how to locate ifconfig and route (simple script change
from ifconfig to /sbin/ifconfig and from route to /sbin/route).
Take a look at the dhclient.conf (5) man page from the ISC package
under "DYNAMIC DNS". You will likely need a dhclient.conf with items
like:
send fqdn.fqdn "test.example.com.";
send fqdn.encoded on;
send fqdn.server-update off;
also request dhcp6.fqdn;
This also assumes that the ISC dhcpd server is configured with
appropriate information to actually have the server perform updates.
I have not actually turned ddns on with DHCPv6 yet, so these are just
suggestions. According to RFC 4704, the protocol supports either
client or server actually performing the updates, but not certain
which cases work properly with ISC at this point.
Please share if/when you get a working configuration with any dhcpv6
client/server combination.
Good Luck.
---Dave Horn
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