2.6.19.2 IPv6 ND broken because ff02::1 not joined

[Pekka Savola]

On Sat, 13 Jan 2007, Pekka Savola wrote:
> FC6 updates-testing kernel based on 2.6.19.2 (kernel-2.6.19-1.2895.fc6) seems 
> to have a broken IPv6 stateless address autoconf.  The previous, successfully 
> tested version was based on 2.6.18.5 (kernel-2.6.18-1.2860.fc6).
>
> The problem appears to be that the host is not joining the all-nodes 
> multicast address (ff02::1) [netstat -g -n], so the IP layer isn't processing 
> the received router advertisements even though you can see them with tcpdump. 
> The solicited node mcast address is joined though. Loopback interface doesn't 
> join ff02::1 either.
>
> linux-2.6-xen.patch at least seems to be making some modifications to IPv6 ND 
> code, but I didn't look closely enough if that's the culprit.
>
> If it matters, the network adapter is Realtek 8139.

Two more bits of information:

  - one person commented off-list that for him, breakage happened 
between 2.6.19.1 and 2.6.19.2.

  - kernel-2.6.20rc4-git4 [latest from devel  kernel-2.6.19-1.2911] is 
also similarly affected.

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings