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Date: Mon, 04 Jun 2007 11:48:46 +0200
From: Jon Otterholm <jon.otterholm@ide.resurscentrum.se>
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Subject: if_bridge and ff:ff:ff:ff:ff:ff
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I'm havinf trouble sending packets to the ethernet broadcast address on 
an if_bridge. It seems as if the onley packets sent from my router to 
ethernet broadcast is arp. I have the following conf:

bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet x.x.x.x netmask 0xffffff80 broadcast x.x.x.x
        ether 00:90:4b:1a:xx:xx
        member: em0.10 flags=1<LEARNING>
        member: em0.10 flags=1<LEARNING>

+ additional ~80 if's

sysctl's:
net.link.bridge.pfil_onlyip=1
net.link.ether.ipfw=0
net.link.bridge.ipfw=1
net.link.bridge.pfil_bridge=1
net.link.bridge.pfil_member=1
net.link.bridge.ipfw_arp=1
net.inet.ip.forwarding=1

In detail the problem is related to dhcpd working an if_bridge.

I know that if_bridge handles arp/revarp in a different manner than 
other traffic to ethernet broadcast, could this be a bug?

//Jon