openwrt eth2.1 não pode receber pacotes

Question

Eu tenho a configuração de rede:

config interface 'lan'
    option ifname 'eth2.1'
    option type 'bridge'
    option proto 'static'
    option ipaddr '192.168.2.1'
    option netmask '255.255.255.0'
    option macaddr '00:17:a5:00:07:5d'

config interface 'wan'
    option ifname 'eth2.2'

config switch
    option name 'mt762x'
    option reset '1'
    option enable_vlan '1'

config switch_vlan
    option device 'mt762x'
    option vlan '1'
    option ports '0 1 2 3 5 6t'

config switch_vlan
    option device 'mt762x'
    option vlan '2'
    option ports '4 6t'

ifconfig:

br-lan    Link encap:Ethernet  HWaddr 00:17:A5:00:07:5D  
      inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:0 (0.0 B)  TX bytes:504 (504.0 B)

eth2      Link encap:Ethernet  HWaddr 00:17:A5:70:07:44  
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:632 errors:0 dropped:440 overruns:0 frame:0
      TX packets:343 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:97202 (94.9 KiB)  TX bytes:11616 (11.3 KiB)
      Interrupt:3 

eth2.1    Link encap:Ethernet  HWaddr 00:17:A5:70:07:44  
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:0 (0.0 B)  TX bytes:504 (504.0 B)

eth2.2    Link encap:Ethernet  HWaddr 00:17:A5:70:07:44  
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

Eu pinguei 192.168.2.2, que é meu host.

eth2.1 tx é 12, mas rx é 0.

Tenho certeza de que o hardware está ok.

quando eu conecto à porta 0, o host pode conectar o roteador。