[ipv6hackers] Autoassign IPv6 address to the interface SENDIN OUT the RA?

Owen DeLong owend at he.net
Wed Mar 28 21:48:09 CEST 2012

Sent from my iPad

On Mar 28, 2012, at 2:30 AM, Marc Heuse <mh at mh-sec.de> wrote:

> Hi Matija,
> your problem can not be solved like this :-)
> your network adapter does send the RA packet to the network to an
> all-node multicast address, so when the packet is echoed on the network,
> your network adapter will ignore it and not pass it on to your kernel.
> your kernel never sees sees packets itself sends as incoming traffic.
> Two solutions: manual configuration, or let a 2nd server also sending RA
> so your first server is picking them up ...
> The second solution I'd call an ugly hack, so it fits the purpose of
> this mailing list ;-)

Most people call that a redundant router, not an ugly duck hack at all.


> Greets,
> Marc
> Am 28.03.2012 10:05, schrieb Matija Grabnar:
>> Hi!
>> This question may be too trivial for this group, please be patient and
>> just point me to the relevant docs if so.
>> The background: I have a network of Linux servers. One of the servers is
>> the
>> IPv6 gateway, and it uses radvd to notify all the other servers of the
>> network prefix,
>> so the servers can autoconfigure their IPv6 addresses.
>> So far, no problems. The problem I have is that the interface I am
>> sending FROM does not
>> autoconfigure - unless I assign an address to it manually, (for instance
>> in /etc/network/interfaces)
>> it only gets a link local address.
>> It's not a critical problem, I just find it annoying, and I'd like to
>> find a way to fix it. I looked through the radvd man page and couldn't
>> see anything relevant. Anyway, I suspect it may be something I need to
>> set on the Linux (in this particular case, Debian) side, and not in radvd.
>> Any hints, comments, pointers?
>> _______________________________________________
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> --
> Marc Heuse
> www.mh-sec.de
> PGP: FEDD 5B50 C087 F8DF 5CB9  876F 7FDD E533 BF4F 891A
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