openwrt 使用 移动WIFI USB RNDIS 上网

最初为了简单，是使用 无线中继方式上网，但是有时不稳定，而移动WIFI 也支持 RNDIS 方式。

打开编译配置以下功能：

编译完成后，升级后插入USB 线测试

[  110.492259] usb 1-1: new high-speed USB device number 2 using xhci-mtk
[  110.675695] usb-storage 1-1:1.0: USB Mass Storage device detected
[  110.683867] scsi host0: usb-storage 1-1:1.0
[  111.723145] scsi 0:0:0:0: CD-ROM USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
[  111.745418] sd 0:0:0:1: Power-on or device reset occurred
[  111.751451] sd 0:0:0:1: [sda] Media removed, stopped polling
[  111.757987] sd 0:0:0:1: [sda] Attached SCSI removable disk
[  114.725905] usb 1-1: USB disconnect, device number 2
[  115.272400] usb 1-1: new high-speed USB device number 3 using xhci-mtk
[  115.472810] cdc_ether 1-1:1.0 eth1: register 'cdc_ether' at usb-1e1c0000.xhci-1, XXX CDC Ethernet Device, xx:xx:xx:xx:xx:xx
[  115.489962] usb-storage 1-1:1.2: USB Mass Storage device detected
[  115.522355] scsi host0: usb-storage 1-1:1.2

ifconfig 查看多出来一个 eth1 并且自动获取了IP 

eth1      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xxinet addr:192.168.0.118  Bcast:192.168.0.255  Mask:255.255.255.0inet6 addr: 0/64 Scope:LinkUP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1RX packets:16 errors:0 dropped:0 overruns:0 frame:0TX packets:19 errors:0 dropped:0 overruns:0 carrier:0collisions:0 txqueuelen:1000RX bytes:1216 (1.1 KiB)  TX bytes:2030 (1.9 KiB)

配置网络wan 使用 eth1 选择 DHCP 客户端