Unable to add IPv6 option to dhcp config file

ShashidharReddy Polepalli-JDXW34 shashidhar at motorola.com
Fri May 7 06:21:07 UTC 2010

Hi Glenn,
Excerpt from the dhcpd man page under "DEFINING NEW OPTIONS"

       Options  can  contain  arrays  of any of the above types except
for the
       text and data string types, which aren't currently supported in
       An example of an array definition is as follows:

       option kerberos-servers code 200 = array of ip-address;
       option kerberos-servers,;

I have added the option as below in red to an already existing
dhcpd.conf file.

subnet netmask {
default-lease-time 86400;
max-lease-time 86400;
option routers;
option domain-name-servers;
option domain-name "domain_not_set.invalid";
option OPTION_6RD code 201 = array of integer 8;

Below is the error I get
/etc/dhcpd.conf line 8: option definitions may not be scoped.
option OPTION_RD code
/etc/dhcpd.conf line 9: unknown option dhcp.OPTION_RD
option OPTION_RD 200,
Configuration file errors encountered -- exiting

FYI : Link for the draft RFC which has a mention of OPTION_6RD option


-----Original Message-----
From: dhcp-users-bounces+shashidhar=motorola.com at lists.isc.org
[mailto:dhcp-users-bounces+shashidhar=motorola.com at lists.isc.org
<mailto:dhcp-users-bounces+shashidhar=motorola.com at lists.isc.org> ] On
Behalf Of Glenn Satchell
Sent: Friday, May 07, 2010 11:22 AM
To: Users of ISC DHCP
Subject: Re: Unable to add IPv6 option to dhcp config file

Hi Shashi

Have you looked at the section "DEFINING NEW OPTIONS" in the
dhcp-options man page? This explains the format and syntax for user
defined or customised options.

Can you post the code you have tried and whatever the definition is in
the RFC? Someone here may be able to correct it for you.


On 05/07/10 15:19, ShashidharReddy Polepalli-JDXW34 wrote:
> The draft and IANA appears to have not assigned option code.
> I have tried to add my own option code number in couple of ways. It
> either says unrecognized option or option not scoped.
> Would it be possible to define your own option number , name and
> define your own organized array as per draft RFC?
> Regards,
> Shashi
> ----------------------------------------------------------------------
> --
> *From:* dhcp-users-bounces+shashidhar=motorola.com at lists.isc.org
> [mailto:dhcp-users-bounces+shashidhar=motorola.com at lists.isc.org
<mailto:dhcp-users-bounces+shashidhar=motorola.com at lists.isc.org> ] *On
> Behalf Of *Patrik Lahti
> *Sent:* Thursday, May 06, 2010 8:01 PM
> *To:* Users of ISC DHCP
> *Subject:* Re: Unable to add IPv6 option to dhcp config file
> What are you trying to put into dhcpd.conf exactly?
> Could the problem be that it's a draft and IANA hasn't assigned an
> option code for OPTION_6RD?
> /P
> On 06/05/10 08:36 AM, ShashidharReddy Polepalli-JDXW34 wrote:
>> Hi,
>> Im unable to add OPTION_6RD to the dhcpd.conf file as mentioned in
>> the http://tools.ietf.org/html/draft-ietf-softwire-ipv6-6rd-01
>> Would appreciate quick response in this regard.
>> Thanks,
>> Shashi
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