[openib-general] IPv6 multicast address per NIC

[Hal Rosenstock]

Or,

On Thu, 2007-02-15 at 04:25, Or Gerlitz wrote:
> Hi,
> 
> I see that when IPv6 is enabled in the kernel, the stack joins for a 
> --dedicated-- multicast group per each interface. Can anyone here supply 
> me with a pointer to where this is defined, doing a quick look on rfc 
> 3307 did not provide an answer.

You are referring to the solicited-node multicast address (see RFC
4291). There have been several different threads on issues relating to
this on this list over time.

-- Hal

> Or.
> 
> Below is the maddr show on a node with two partitions on ib0, note that 
> the --pkey-- is not presented in the link addresses since IPoIB fill 
> that in its own copy (i don't mind send a patch to fix that if anyone 
> here think it is helpful).
> 
> $ ip maddr show
> 
> > 41:     ib0
> >         link  00:ff:ff:ff:ff:12:40:1b:00:00:00:00:00:00:00:00:00:00:00:01
> >         link  00:ff:ff:ff:ff:12:60:1b:00:00:00:00:00:00:00:01:ff:98:00:6d
> >         link  00:ff:ff:ff:ff:12:60:1b:00:00:00:00:00:00:00:00:00:00:00:01
> >         inet  224.0.0.1
> >         inet6 ff02::1:ff98:6d
> >         inet6 ff02::1
> > 45:     ib0.8001
> >         link  00:ff:ff:ff:ff:12:40:1b:00:00:00:00:00:00:00:00:00:00:00:01
> >         link  00:ff:ff:ff:ff:12:60:1b:00:00:00:00:00:00:00:01:ff:98:00:6d
> >         link  00:ff:ff:ff:ff:12:60:1b:00:00:00:00:00:00:00:00:00:00:00:01
> >         inet  224.0.0.1
> >         inet6 ff02::1:ff98:6d
> >         inet6 ff02::1
> > 46:     ib0.8003
> >         link  00:ff:ff:ff:ff:12:40:1b:00:00:00:00:00:00:00:00:00:00:00:01
> >         link  00:ff:ff:ff:ff:12:60:1b:00:00:00:00:00:00:00:01:ff:98:00:6d
> >         link  00:ff:ff:ff:ff:12:60:1b:00:00:00:00:00:00:00:00:00:00:00:01
> >         inet  224.0.0.1
> >         inet6 ff02::1:ff98:6d
> >         inet6 ff02::1
> > 
>