2.6.19.2 IPv6 ND broken because ff02::1 not joined

Pekka Savola pekkas at netcore.fi
Sat Jan 13 15:53:54 UTC 2007


Hi,

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.

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




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