same link-local address on multiple interface and OSPFv3

[Matjaž Straus Istenič]

On 28. jun. 2013, at 21:51, Benedikt Stockebrand <bs at stepladder-it.com> wrote:

> Hi Matjaž and list,
> 
> Matjaž Straus Istenič <matjaz.straus at arnes.si> writes:
> 
>> [OSPF problem with multiple interfaces holding the same link-local
>> address]
>> 
>> It looks a *bug* to me.
> 
> It is.  What hardware/software combo do you have this problem on?  Have
> you opened a case with the vendor yet?

Yes, we've opened the case and the vendor is aware of the issue. The problem is manifested only if the router is configured with the logical routing interfaces which belong to some bridge domains. In this case all these interfaces share the same hardware address and consequently the same link-local address. This type of configuration is rather new for that particular router, that's why I do not wish to put the pressure on the vendor by exposing them publicly. I wish the will realize this is something they have to fix soon :-)

> 
>> Workaround is rather simple: use different link-local addresses on
>> IPv6-enabled interfaces and you are safe.
> 
> That's simple until someone decided to make life easier by using
> interface IDs that identify the router for the link-local addresses; I
> personally have a tendency to opt for fe80::feed:<router number>/64, and
> I've seen other people do similar things.  You bring one of these
> machines into an existing network with that sort of addressing scheme,
> and the rather simple workaround means that addressing scheme goes down
> the drain.
> 
> Feel free to quote me on this if the vendor can't be bothered to
> consider this a "real" problem:-)

:-)

> 
> 
> Cheers,
> 
>    Benedikt
> 
> -- 
> 			 Business Grade IPv6
> 		    Consulting, Training, Projects
> 
> Benedikt Stockebrand, Dipl.-Inform.        http://www.stepladder-it.com/

Kind regards,
	Matjaž