一个VLAN设置实例

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emac1: 

        address: xx:xx:xx:xx:00:90

        inet 17.18.5.88 netmask 0xffffff00 broadcast 17.18.5.255



rt0: 

        address: xx:xx:xx:xx:00:88

        inet 192.168.1.12 netmask 0xffffff00 broadcast 192.168.1.255

        

bridge0: flags=0 mtu 1500

vlan11: 

        vlan: 11 priority: 0 parent: emac1

        address: xx:xx:xx:xx:00:90

        inet 17.18.11.90 netmask 0xffffff00 broadcast 17.18.11.255

       

vlan16: 

        vlan: 16 priority: 0 parent: emac1

        address: xx:xx:xx:xx:00:90

        inet 17.18.16.90 netmask 0xffffff00 broadcast 17.18.16.255

      

vlan2:

        vlan: 2 priority: 0 parent: rt0

        address: xx:xx:xx:xx:00:88

        inet 17.18.2.88 netmask 0xffffff00 broadcast 17.18.2.255

       

vlan3: 

        vlan: 3 priority: 0 parent: rt0

        address: xx:xx:xx:xx:00:88

        inet 17.18.3.88 netmask 0xffffff00 broadcast 17.18.3.255

       

vlan4: 

        vlan: 4 priority: 0 parent: rt0

        address: xx:xx:xx:xx:00:88

        inet 17.18.4.88 netmask 0xffffff00 broadcast 17.18.4.255

        

vlan13: 

        vlan: 13 priority: 0 parent: rt0

        address: xx:xx:xx:xx:00:88

        inet 17.18.13.88 netmask 0xffffff00 broadcast 17.18.13.255

        

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# arp -a

? (17.18.2.30) at xx:xx:xx:xx:00:30 on vlan2 permanent

? (17.18.2.56) at xx:xx:xx:xx:00:56 on vlan2 permanent

? (17.18.2.57) at xx:xx:xx:xx:00:57 on vlan2 permanent

? (17.18.2.58) at xx:xx:xx:xx:00:58 on vlan2 permanent

? (17.18.2.59) at xx:xx:xx:xx:00:59 on vlan2 permanent

? (17.18.2.66) at xx:xx:xx:xx:00:66 on vlan2 permanent

? (17.18.2.97) at xx:xx:xx:xx:00:97 on vlan2 permanent

? (17.18.2.99) at xx:xx:xx:xx:00:99 on vlan2 permanent

? (17.18.3.50) at xx:xx:xx:xx:00:50 on vlan3 permanent

? (17.18.3.55) at xx:xx:xx:xx:00:55 on vlan3 permanent

? (17.18.3.99) at xx:xx:xx:xx:00:99 on vlan3 permanent

? (17.18.4.81) at xx:xx:xx:xx:00:81 on vlan4 permanent

? (17.18.4.91) at xx:xx:xx:xx:00:91 on vlan4 permanent

? (17.18.4.98) at xx:xx:xx:xx:00:98 on vlan4 permanent

? (17.18.5.89) at xx:xx:xx:xx:00:89 on emac1 permanent

? (17.18.11.97) at xx:xx:xx:xx:00:97 on vlan11 permanent

? (17.18.13.97) at xx:xx:xx:xx:00:97 on vlan13 permanent

? (17.18.18.97) at xx:xx:xx:xx:00:97 on vlan18 permanent

? (192.168.1.12) at xx:xx:xx:xx:00:88 on rt0 permanent

如果把vlan有关的设置从rtl9072中完全删除，那么就会出现这样的结果：

如果以此ip为sip，那么发出的组播包其它port收不到。

如果把vlan有关的设置从rtl9072中完全删除，ifconfig内容好像没有变化，这说明ifconfig结果只和soc系统的ifconfig设置脚本的内容有关。
但是arp -a的结果里面之前可以ping到的ip地址：192.168.1.12变成了测试主机的192.168.1.2