Date: Fri, 19 Nov 2010 12:24:32 +0800 From: Siquijor Philips <siquijorphilips@gmail.com> To: sthaug@nethelp.no Cc: freebsd-net@freebsd.org Subject: Re: How to generate IPv6 RA without any prefixes? Message-ID: <AANLkTik79rpdUYcNqXU9gaG4w67FaeoxtCqozV1HicDT@mail.gmail.com> In-Reply-To: <AANLkTimu5SiyQye1iPaGCuMOjb0im%2BTHUmy=ET_mCcw-@mail.gmail.com> References: <AANLkTimu5SiyQye1iPaGCuMOjb0im%2BTHUmy=ET_mCcw-@mail.gmail.com>
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On Fri, Nov 19, 2010 at 11:19 AM, Siquijor Philips
<siquijorphilips@gmail.com> wrote:
>> On Wed, 10 Nov 2010, sthaug@nethelp.no wrote:
>>
>> Hi,
>>
>>
>> In IPv6 it should be possible to generate a Router Advertisement which
>> contains no prefix options (the idea being that I want the host to
>> populate its default router list but nothing else). However, I cannot
>> seem to get rtadvd to do this.
>>
>> If I start rtadvd with no /etc/rtadvd.conf file, it sends RAs with a
>> prefix option corresponding to the IPv6 address of the interface. In
>> the /etc/rtadvd.conf I can explicitly specify prefixes ("addr"), but
>> I can't find any way to specify that no prefix options should be sent.
>>
>> Any suggestions?
>
> You mean to say that you want your router to act as the default IPv6
> gateway only advertising default route via RA and the IPv6 prefixes
> are managed by other means such as DHCPv6 server? Because by its the
> only way I can think of with your case now. You can specify
> 'pinfoflags' with 'l' in the /etc/rtadvd.conf to suppress the prefix
> information option being advertised.
>
My suggestion above is not complete, you should have something in your
/etc/rtadvd.conf
vlan0:\
:raflags="mo":pinfoflags="l":
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