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ec20正常创建ecm网络后无法连接外网

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#1

EC20 mini-pcie模块，Revision: EC20CEFILGR06A07M1G
通过命令AT+QCFG=“usbnet”,1设置ecm模式，并重启模块后，检查注网状态、信号状态皆正常后，启动udhcpc从模块获取内网ip地址，内网IP能够正常获取到，网关也能正常创建。但无法ping通互联网，查询at+ceer返回2，258 emm detached。手上有另外一个信号的模块EC20CEHCLGR06A05M1G，相同流程下来能够正常连接互联网。请教这个问题要如何处理？完整AT命令执行如下：
at
OK
at+cereg?
+CEREG: 0,1

OK
at+cgreg?
+CGREG: 0,1

OK
at+cgatt?
+CGATT: 1

OK
at+csq
+CSQ: 31,99

OK
at+ceer
+CEER: 6,258

at+cfun=0
OK
at+cfun=1
OK

+CPIN: READY

+QUSIM: 1

+QIND: SMS DONE

+QIND: PB DONE
at+ceer
+CEER: 6,258

OK
at+cgact?
+CGACT: 1,1
+CGACT: 2,0
+CGACT: 3,0

OK

at+cgdcont
OK
at+cgdcont?
+CGDCONT: 1,“IPV4V6”,“3gnet”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0
+CGDCONT: 2,“IPV4V6”,“3GWAP”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0
+CGDCONT: 3,“IPV4V6”,“WONET”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

OK
at+cgpaddr=1
+CGPADDR: 1,“10.66.40.27,36.8.132.13.106.32.167.111.23.112.107.116.175.202.25.162”

OK

#2

修改一下模组的网卡模式成RNDIS看下

AT+QCFG=“usbnet”,3 // 重启生效

#3

切换成RNDIS，故障依旧。
模块EC20CEFILGR06A07M1G能够获取到内网IP，但无法访问外网
模块EC20CEHCLGR06A05M1G能够正常访问
同时遇到新的问题，两个模块的AT端口/dev/ttyUSB2都消失了，所以现在也无法通过AT端口看状态了，这个要怎么恢复？通过lsusb可以看到2c7c 0125的设备能被识别到，dmesg里也没有什么特别有意义的异常信息输出
lsusb:
Bus 001 Device 003: ID 0bda:c82c
Bus 001 Device 001: ID 1d6b:0002
Bus 001 Device 002: ID 1a40:0201
Bus 002 Device 001: ID 1d6b:0003
Bus 001 Device 004: ID 2c7c:0125

dmesg:
usbcore: registered new interface driver r8152
usbcore: registered new interface driver asix
usbcore: registered new interface driver ax88179_178a
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver net1080
usbcore: registered new interface driver rndis_host
usbcore: registered new interface driver cdc_subset
usbcore: registered new interface driver zaurus
usbcore: registered new interface driver cdc_ncm
xhci-hcd 100e0000.xhci_0: xHCI Host Controller
xhci-hcd 100e0000.xhci_0: new USB bus registered, assigned bus number 1
xhci-hcd 100e0000.xhci_0: hcc params 0x0220fe6c hci version 0x110 quirks 0x20010010
xhci-hcd 100e0000.xhci_0: irq 30, io mem 0x100e0000
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
xhci-hcd 100e0000.xhci_0: xHCI Host Controller
xhci-hcd 100e0000.xhci_0: new USB bus registered, assigned bus number 2
usb usb2: We don’t know the algorithms for LPM for this host, disabling LPM.
hub 2-0:1.0: USB hub found
hub 2-0:1.0: hub can’t support USB3.0
usbcore: registered new interface driver usb-storage
usbcore: registered new interface driver usbserial
usbcore: registered new interface driver option
usbserial: USB Serial support registered for GSM modem (1-port)
mousedev: PS/2 mouse device common for all mice
usbcore: registered new interface driver xpad
hibvt_rtc 12080000.rtc: rtc core: registered 12080000.rtc as rtc0
rndis_host 1-1.2:1.0 usb0: register ‘rndis_host’ at usb-100e0000.xhci_0-1.2, RNDIS device, e6:db:44:f9:da:a5
option 1-1.2:1.2: GSM modem (1-port) converter detected
usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB0
option 1-1.2:1.3: GSM modem (1-port) converter detected
usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB1

#4

已咨询FAE，R06A07固件问题，升级R06A09后ECM和RNDIS均正常