bridging

[saeedeh motlagh]

hello everybody
i have a problem in bridging my interfaces. i want to bridge my 4
interfaces and make switching in freebsd box but in doesn't work. with two
interfaces the bridge works well and pass the traffic but for four
interfaces in doesn't what is expected. you know i want to have a freebsd
sysytem to do switching between four systems which are connected to.
somebody know what's wrong? and how i can bridge my four interfaces and
have switching?
thanks
motlagh