If_bridge behaving as HUB

Andrew Thompson thompsa at freebsd.org
Mon Oct 16 16:36:14 UTC 2006

On Mon, Oct 16, 2006 at 12:15:13PM +0200, Jon Otterholm wrote:
> Hi.
> I have a bridge setup with a number of vlan IF's as members. After a 
> while traffic destined for one member IF are sent to all member IF's.
> From man if_bridge:
>     A bridge works like a hub, forwarding traffic from one interface to
>     another.  Multicast and broadcast packets are always forwarded to all
>     interfaces that are part of the bridge.  For unicast traffic, the 
> bridge
>     learns which MAC addresses are associated with which interfaces and 
> will
>     forward the traffic selectively.
> Has anyone else got this problem? How do I debug this?

You should run 'ifconfig bridge0 addr' to print out the forwarding
table, check if the mac address is listed on the correct port.


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