eth0: Atheros AG71xx at 0xb9000000, irq 4
eth1: Atheros AG71xx at 0xba000000, irq 5
eth1: AR0 switch driver attached.
Atheros AR71xx hardware watchdog driver version 0.1.0

root@OpenWrt:/# ifconfig
br-lan    Link encap:Ethernet  HWaddr 00:15:6D:C1:C8:BA
          inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:928 errors:0 dropped:0 overruns:0 frame:0
          TX packets:592 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:57627 (56.2 KiB)  TX bytes:41210 (40.2 KiB)

eth0      Link encap:Ethernet  HWaddr 00:15:6D:C1:C8:B9
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0    << notice 0 received packets
          TX packets:36 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:14508 (14.1 KiB)
          Interrupt:4

eth1      Link encap:Ethernet  HWaddr 00:15:6D:C1:C8:BA
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:940 errors:0 dropped:0 overruns:0 frame:0
          TX packets:592 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:71339 (69.6 KiB)  TX bytes:41210 (40.2 KiB)
          Interrupt:5

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:512 errors:0 dropped:0 overruns:0 frame:0
          TX packets:512 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:35840 (35.0 KiB)  TX bytes:35840 (35.0 KiB)

root@OpenWrt:/# swconfig dev eth1 show
Global attributes:
        enable_vlan: 1
Port 0:
        pvid: 1
Port 1:
        pvid: 1
Port 2:
        pvid: 1
Port 3:
        pvid: 1
Port 4:
        pvid: 1
Port 5:
        pvid: 0
VLAN 1:
        vid: 1
        ports: 0 1 2 3 4
root@OpenWrt:/# swconfig dev eth1 help
switch0: eth1(Atheros AR8216), ports: 6 (cpu @ 0), vlans: 16  << Notice switch type.
     --switch
        Attribute 1 (int): enable_vlan (Enable VLAN mode)
        Attribute 2 (none): apply (Activate changes in the hardware)
        Attribute 3 (none): reset (Reset the switch)
     --vlan
        Attribute 1 (int): vid (VLAN ID (0-4094))
        Attribute 2 (ports): ports (VLAN port mapping)
     --port
        Attribute 1 (int): pvid (Primary VLAN ID)