(usagi-users 03476) Re: Source address for neighbor solicitations

[Peter Bieringer <pb@xxxxxxxxxxxx>]

--On Saturday, June 25, 2005 11:59:56 AM +0200 Ignacy Gawedzki <ig@xxxxxx>
wrote:

> On Fri, Jun 24, 2005 at 10:25:42PM +0200, thus spake Peder Chr. Norgaard:
>> I don't think I really understand the context of your question.  (I
>> assume you are talking IPv6, yes?).  What are the "routers" that you are
>> writing about?  It cannot be linux 2.6.something kernels - they
>> certainly have link-local addresses on all IPv6 interfaces.
> 
> They are linux 2.4 kernels in fact, but I suppose they could easily be 2.6
> too.  An interface gets assigned a link-local address automatically as
> soon as it's set up, but you can ever remove that address manually.

I had such problems with removed link-local addresses also (radvd don't
like such behavior). Sometimes I had to reboot twice to get autoconfigured
link-local back.

So I have 2 suggestions:

create a kernel parameter (sysctl) like:

ipv6 / interface / link_local_address_behavior = 1 (default)  (r/w)

1: don't let remove the last existing link-local address on an interface
If one want to change the link-local address, he had to add the new one
first before removing the autogenerated one

0: let remove


In addition it would be great to be able to trigger a new autogenerated
link-local address if the original was removed, e.g. by writing some
command to 

ipv6 / interface / link_local_address_regenerate = 1  (w only)


        Peter
-- 
Dr. Peter Bieringer                     http://www.bieringer.de/pb/
GPG/PGP Key 0x958F422D               mailto: pb at bieringer dot de 
Deep Space 6 Co-Founder and Core Member  http://www.deepspace6.net/