测试平台：
Thinkpad R60
RHEL5
dynagen 0.10.1.090807
dynamips 0.2.8-RC2-x86


1>安装bridge-utils
#rpm -ivh bridge-utils-1.1-2.i386.rpm
warning: bridge-utils-1.1-2.i386.rpm: Header V3 DSA signature: NOKEY, key ID 4f2a6fd2
Preparing...                ########################################### [100%]
   1:bridge-utils           ########################################### [100%]
#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


2>配置文件：
[[router rta]]
    model = 2691
    slot1 = NM-4T
    f0/0 = NIO_tap:tap0
    s1/0 = rtb s1/0

3>运行dynagen，tap0在dynagen运行起来后就被自动创建了。


4>建立接口绑定：
#brctl addbr br0
#brctl addif br0 eth0
#brctl addif br0 tap0

5>配置接口：
#ifconfig tap0 up
#ifconfig eth0 0.0.0.0 up
#ifconfig br0 192.168.1.99 255.255.255.0


6>在dynagen启动相应虚拟设备：
=> start rta


7>测试：
rta#sh run int f0/0
Building configuration...

Current configuration : 97 bytes
!
interface FastEthernet0/0
 ip address 192.168.1.91 255.255.255.0
 duplex auto
 speed auto
end

rta#ping 192.168.1.99

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.99, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/8 ms
rta#

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