我正在尝试使用 OpenWRT BARRIER BREAKER（14.07-rc2，r41815）将 4G 调制解调器 Quanta 1k6e 连接到我的 wl500g 路由器，但遇到了麻烦。当我连接设备时，日志中会出现：
Thu Aug 14 21:58:06 2014 kern.info kernel: [ 161.580000] usb 2-2: new full-speed USB device number 5 using uhci_hcd
Thu Aug 14 21:58:07 2014 kern.info kernel: [ 161.800000] rndis_host 2-2:1.0 eth1: register 'rndis_host' at usb-0000:00:03.0-2, RNDIS device, 00:16:36:9c:4f:b5
00:16:36:9c:4f:b5- 我在 Windows 机器上安装了这台 MAC，我的调制解调器工作正常。
日志中的下一个：
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' is enabled
Thu Aug 14 21:58:07 2014 kern.info kernel: [ 161.850000] usb-storage 2-2:1.2: USB Mass Storage device detected
Thu Aug 14 21:58:07 2014 kern.info kernel: [ 161.850000] scsi5 : usb-storage 2-2:1.2
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Network device 'eth1' link is up
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' has link connectivity
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' is setting up now
Thu Aug 14 21:58:07 2014 kern.info kernel: [ 162.040000] usb 2-2: USB disconnect, device number 5
Thu Aug 14 21:58:07 2014 kern.info kernel: [ 162.040000] rndis_host 2-2:1.0 eth1: unregister 'rndis_host' usb-0000:00:03.0-2, RNDIS device
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Network device 'eth1' link is down
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' has link connectivity loss
Thu Aug 14 21:58:07 2014 kern.info kernel: [ 162.390000] usb 2-2: new full-speed USB device number 6 using uhci_hcd
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' is now down
Thu Aug 14 21:58:07 2014 kern.info kernel: [ 162.620000] cdc_ether 2-2:1.0 eth1: register 'cdc_ether' at usb-0000:00:03.0-2, CDC Ethernet Device, 00:16:36:51:54:57
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' is disabled
Thu Aug 14 21:58:07 2014 kern.info kernel: [ 162.650000] usb-storage 2-2:1.2: USB Mass Storage device detected
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' is enabled
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Network device 'eth1' link is up
Thu Aug 14 21:58:07 2014 kern.info kernel: [ 162.660000] scsi6 : usb-storage 2-2:1.2
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' has link connectivity
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' is setting up now
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Network device 'eth1' link is down
Thu Aug 14 21:58:07 2014 daemon.notice netifd: Interface 'cdc' has link connectivity loss
Thu Aug 14 21:58:08 2014 daemon.notice netifd: cdc (1614): udhcpc (v1.22.1) started
Thu Aug 14 21:58:08 2014 kern.notice kernel: [ 163.730000] scsi 6:0:0:0: Direct-Access Virtual Mass-Storage 0000 PQ: 0 ANSI: 2
Thu Aug 14 21:58:09 2014 kern.notice kernel: [ 163.800000] sd 6:0:0:0: Attached scsi generic sg2 type 0
Thu Aug 14 21:58:09 2014 kern.notice kernel: [ 163.850000] sd 6:0:0:0: [sdb] Attached SCSI removable disk
Thu Aug 14 21:58:09 2014 daemon.notice netifd: cdc (1614): Sending discover...
Thu Aug 14 21:58:12 2014 daemon.notice netifd: cdc (1614): Sending discover...
Thu Aug 14 21:58:15 2014 daemon.notice netifd: cdc (1614): Sending discover...
之后我得到了cdc接口，但没有分配IP地址。即使我手动分配IP：
- 192.168.225.38（在 Windows 计算机上分配的一个），或
- 192.168.225.1（在调制解调器的 WEB UI 上指定为调制解调器地址），
没有回复。
我试过
echo -n 2-2:1.0 > /sys/bus/usb/drivers/cdc_ether/unbind
成功解绑cdc_ether：
T: Bus=02 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 6 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=02(comm.) Sub=06 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0408 ProdID=ea45 Rev= 0.00
S: Manufacturer=QUANTA
S: Product=Mobile Broadband
S: SerialNumber=357264046968757
C:* #Ifs= 3 Cfg#= 1 Atr=80 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=(none)
E: Ad=83(I) Atr=03(Int.) MxPS= 16 Ivl=32ms
I:* If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=(none)
I: If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=82(I) Atr=02(Bulk) MxPS= 8 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
但是当我尝试绑定时rndis_host driver：
echo -n 2-2:1.0 > /sys/bus/usb/drivers/rndis_host/bind
我收到错误：
write error: No such device
请帮助我解决我的问题。