I'd like to swap the address assignment between eth0 and eth1 on my TPLink 741ND router running Openwrt trunk r25032.
Current situation is :

root@OpenWrt:/# ifconfig
br-lan    Link encap:Ethernet  HWaddr 74:EA:3A:B8:ED:AF
          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:22403 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11241 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4329591 (4.1 MiB)  TX bytes:606834 (592.6 KiB)

eth0      Link encap:Ethernet  HWaddr 74:EA:3A:B8:ED:AF
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:22426 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11242 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4644739 (4.4 MiB)  TX bytes:607877 (593.6 KiB)
          Interrupt:5

eth1      Link encap:Ethernet  HWaddr 74:EA:3A:B8:ED:AE
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5871 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:2366013 (2.2 MiB)
          Interrupt:4

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: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)