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yum install brige-util 
[root@localhost ~]# brctl
Usage: brctl [commands]
commands:
        addbr           <bridge>                add bridge
        delbr           <bridge>                delete bridge
        addif           <bridge> <device>       add interface to bridge
        delif           <bridge> <device>       delete interface from bridge
        setageing       <bridge> <time>         set ageing time
        setbridgeprio   <bridge> <prio>         set bridge priority
        setfd           <bridge> <time>         set bridge forward delay
        sethello        <bridge> <time>         set hello time
        setmaxage       <bridge> <time>         set max message age
        setpathcost     <bridge> <port> <cost>  set path cost
        setportprio     <bridge> <port> <prio>  set port priority
        show                                    show a list of bridges
        showmacs        <bridge>                show a list of mac addrs
        showstp         <bridge>                show bridge stp info
        stp             <bridge> {on|off}       turn stp on/off
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[root@localhost ~]# brctl addbr br0
[root@localhost ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.000000000000       no
[root@localhost ~]# brctl addif br0 eth1
[root@localhost ~]# brctl addif br0 eth2
[root@localhost ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.0015173a009c       no              eth1
                                                                   eth2
[root@localhost network-scripts]# ifconfig eth1 0.0.0.0 promisc up
[root@localhost network-scripts]# ifconfig eth2 0.0.0.0 promisc up
[root@localhost network-scripts]# ifconfig br0 promisc up
ºê¸´Áö start / stop ½ºÅ©¸³Æ®´Â ¾Ë¾Æ¼ ÀÛ¼ºÇϽñæ...