On Fri, Aug 12, 2011 at 3:45 PM, Stephen Hemminger
[off-list ref] wrote:

If you turn off STP that is what it does right now. It forwards STP
and 802.1X frames. The patch was only related to turning on STP
and still expecting 802.1X frames to be forwarded (in violation of
the spec).

As far as I can tell, the only case currently where the bridge
forwards a packet destined for a link-local multicast address is

  if (p->br->stp_enabled == BR_NO_STP && dest[5] == 0)

dest[5] != 0 for an LLDP packet, whose destination address is
01-80-C2-00-00-0E per IEEE 802.1AB-2005.

--Ed