# EM7455 exposing LAN interface **URL:** \ **Category:** IoT Modules\ **Created:** [December 31, 2022, 3:52pm UTC](https://forum.sierrawireless.com/t/em7455-exposing-lan-interface/28665 "2022-12-31T15:52:30Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![qm8yqv\_7pwkd4cszca7o](https://avatars.discourse-cdn.com/v4/letter/q/c5a1d2/32.png) [@qm8yqv\_7pwkd4cszca7o](https://forum.sierrawireless.com/u/qm8yqv_7pwkd4cszca7o)\ **Post date:** [December 31, 2022, 3:52pm UTC](https://forum.sierrawireless.com/t/em7455-exposing-lan-interface/28665/1 "2022-12-31T15:52:30Z")
// this **requires** access to adb or // IF you can do it through qmicli, dont know, havent tried it, if you can do it, leave a comment on howto // linux device is EM7455, linux host is Debian11 // on host do: adb shell //on device do: / # ls -lisa /sys/class/android\_usb/android0/|grep ‘f\_’ 13739 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_accessory 13582 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_acm 13459 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_audio 13762 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_audio\_source 13547 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_ccid 13505 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_diag 13678 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_ecm 13446 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_ecm\_qc 13409 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_ffs 13494 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_gps 13703 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_mass\_storage 13594 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_mtp 13691 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_ncm 13617 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_ptp 13517 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_qdss 13481 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_rmnet 13470 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_rmnet\_smd 13628 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_rndis 13647 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_rndis\_qc 13531 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_serial 13774 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_uasp 13728 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_ubist 13421 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_usb\_mbim 13401 0 -rw-r–r-- 1 root root 4096 Dec 30 17:47 self\_powered / # these above are the gadgets you can use. / # ls -lisa /usr/bin/usb/compositions/ total 116 361 4 drwxr-xr-x 1 root root 4096 Dec 27 14:41 . 359 4 drwxr-xr-x 1 root root 4096 Apr 28 2017 … 382 2 -rwxr-xr-x 1 root root 2440 Apr 28 2017 901D 374 4 -rwxr-xr-x 1 root root 4106 Apr 28 2017 9021 370 4 -rwxr-xr-x 1 root root 4283 Apr 28 2017 9022 373 3 -rwxr-xr-x 1 root root 3576 Apr 28 2017 9024 369 4 -rwxr-xr-x 1 root root 4428 Apr 28 2017 9025 385 4 -rwxr-xr-x 1 root root 3621 Apr 28 2017 902B 363 4 -rwxr-xr-x 1 root root 3791 Apr 28 2017 902D 372 5 -rwxr-xr-x 1 root root 4615 Apr 28 2017 9049 377 3 -rwxr-xr-x 1 root root 2960 Apr 28 2017 904A 371 4 -rwxr-xr-x 1 root root 4434 Apr 28 2017 9056 366 3 -rwxr-xr-x 1 root root 3464 Apr 28 2017 9057 378 4 -rwxr-xr-x 1 root root 3834 Apr 28 2017 9059 387 4 -rwxr-xr-x 1 root root 3736 Apr 28 2017 905B 383 3 -rwxr-xr-x 1 root root 3113 Apr 28 2017 9060 384 4 -rwxr-xr-x 1 root root 4204 Apr 28 2017 9063 376 6 -rwxr-xr-x 1 root root 5682 Apr 28 2017 9064 362 5 -rwxr-xr-x 1 root root 4977 Apr 28 2017 9067 1291 6 -rwxr-xr-x 1 root root 5836 Dec 26 16:22 9079 375 4 -rwxr-xr-x 1 root root 4013 Apr 28 2017 9084 386 4 -rwxr-xr-x 1 root root 4152 Apr 28 2017 9085 389 2 -rwxr-xr-x 1 root root 2497 Apr 28 2017 90A1 388 3 -rwxr-xr-x 1 root root 3141 Apr 28 2017 90A9 367 3 -rwxr-xr-x 1 root root 2873 Apr 28 2017 90AD 380 2 -rwxr-xr-x 1 root root 2247 Apr 28 2017 90B1 381 3 -rwxr-xr-x 1 root root 2593 Apr 28 2017 90B9 368 2 -rwxr-xr-x 1 root root 2252 Apr 28 2017 F000 379 0 -rwxr-xr-x 1 root root 127 Apr 28 2017 empty 390 0 -rwxr-xr-x 1 root root 2 Apr 28 2017 hsic\_next 365 0 -rwxr-xr-x 1 root root 5 Apr 28 2017 hsusb\_next 364 4 -rwxr-xr-x 1 root root 3884 Apr 28 2017 sierra / # the above are different compositions you can switch your device to, NOTE: the compositions are not sierra specific, but are specific to Qualcomm MDM9x15, MDM9x25, MBM9x35 devices to switch cmposition use: / # usb\_composition boot hsusb composition: sierra boot hsic composition: empty Choose Composition by Pid: 901D - DIAG + ADB 9021 - DIAG + QMI\_RMNET (Android) 9022 - DIAG + ADB + QMI\_RMNET (Android) 9024 - RNDIS + ADB [Android] 9025 - DIAG + ADB + MODEM + NMEA + QMI\_RMNET + Mass Storage (Android) 902B - RNDIS + ADB + Mass Storage 902D - RNDIS + DIAG + ADB [Android] 9049 - DIAG + ADB + DUN + RMNET + Mass Storage + QDSS [Android] 904A - DIAG + QDSS [Android] 9056 - DIAG + ADB + SERIAL + RMNET + Mass Storage + Audio [Android] 9057 - RNDIS : ECM 9059 - DIAG+ADB+RNDIS : ECM 905B - MBIM 9060 - DIAG + QDSS + ADB 9063 - RNDIS : ECM : MBIM 9064 - DIAG + ADB + MODEM + QMI\_RMNET : ECM : MBIM 9067 - Mass storage + QMI\_RMNET : Mass Storage + MBIM 9079 - DIAG + ADB + MODEM + QMI\_RMNET : ECM : MBIM 9084 - DIAG + QDSS + ADB + RMNET 9085 - DIAG+ADB+MBIM+GNSS 90A1 - DIAG + ADB + (multiplexed) QMI\_RMNET (Android) 90A9 - DIAG + ADB + MODEM + NMEA + QDSS (bulk in) + RMNET : ECM : MBIM 90AD - DIAG + ADB + MODEM + NMEA + QMI\_RMNET + Mass Storage + DPL 90B1 - ECM 90B9 - DIAG + DUN + RMNET1 + RMNET2 + ADB [MDM.LE] F000 - Mass Storage empty - it is used to allow either hsic or hsusb to have no composition at all(must reboot to take effect). hsic\_next - hsusb\_next - sierra - DIAG + ADB + NMEA + MODEM + QMI\_RMNET Pid number : custom composition can be added, or existing modified. // use hash to comment out // to expose private LAN, copy/paste or make one, in the same directory, echo 0 \> /sys/class/android\_usb/android$num/enable // echo 9079 \> /sys/class/android\_usb/android$num/idProduct // echo 1199 \> /sys/class/android\_usb/android$num/idVendor // echo 239 \> /sys/class/android\_usb/android$num/bDeviceClass // echo 2 \> /sys/class/android\_usb/android$num/bDeviceSubClass // echo 1 \> /sys/class/android\_usb/android$num/bDeviceProtocol echo diag \> /sys/class/android\_usb/android0/f\_diag/clients echo smdnmea,smd \> /sys/class/android\_usb/android0/f\_serial/transports echo QTI,BAM2BAM\_IPA \> /sys/class/android\_usb/android0/f\_rmnet/transports echo ccid \> /sys/class/android\_usb/android0/f\_ccid/transports echo BAM2BAM\_IPA \> /sys/class/android\_usb/android0/f\_ecm\_qc/ecm\_transports echo diag,ffs,serial,ecm\_qc,ccid \> /sys/class/android\_usb/android$num/functions // echo BAM2BAM\_IPA \> /sys/class/android\_usb/android0/f\_ecm\_qc/ecm\_transports // echo BAM2BAM\_IPA \> /sys/class/android\_usb/android0/f\_usb\_mbim/mbim\_transports echo 1 \> /sys/class/android\_usb/android$num/remote\_wakeup sleep $delay echo 1 \> /sys/class/android\_usb/android$num/enable ecm is going to create ecm0 on device side, on host side its going to create usb0 (thats what it is for me, although, i still want eth0, not usb0). driver on host side is cdc\_ether rest is DYO, peace:) p.s. in usb\_compositions use: n,n,y,y if you screw it up, reboot, its non-presistent. ---
**Author:** ![qm8yqv\_7pwkd4cszca7o](https://avatars.discourse-cdn.com/v4/letter/q/c5a1d2/32.png) [@qm8yqv\_7pwkd4cszca7o](https://forum.sierrawireless.com/u/qm8yqv_7pwkd4cszca7o)\ **Post date:** [December 31, 2022, 4:15pm UTC](https://forum.sierrawireless.com/t/em7455-exposing-lan-interface/28665/2 "2022-12-31T16:15:54Z")
> [@EM7455 exposing LAN interface](https://forum.sierrawireless.com/t/em7455-exposing-lan-interface/28665): > > // this requires access to adb or // IF you can do it through qmicli, dont know, havent tried it, if you can do it, leave a comment on howto // linux device is EM7455, linux host is Debian11 // on host do: adb shell //on device do: / # ls -lisa /sys/class/android\_usb/android0/|grep ‘f\_’ 13739 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_accessory 13582 0 drwxr-xr-x 3 root root 0 Jan 1 1970 f\_acm 13459 0 drwxr-xr-x 3 root root … ---
**Author:** ![sagarch.mail](https://avatars.discourse-cdn.com/v4/letter/s/58f4c7/32.png) [@sagarch.mail](https://forum.sierrawireless.com/u/sagarch.mail)\ **Post date:** [May 4, 2023, 4:04pm UTC](https://forum.sierrawireless.com/t/em7455-exposing-lan-interface/28665/3 "2023-05-04T16:04:21Z")
Hi there! I was able to enable RDINS/ECM interface on my EM7455 following this material, thanks for the effort ! What I am struggling right now is to be able to get and assign WAN IP on rmnet\_data0 as you mentioned in the other post. I also tried to assign the +CGPADDR=1 address manually on rmnet\_data0 but no connectivity is received. How did you establish WWAN connectivity directly in the the modem? Once that’s done I can see that I can setup NAT inside the modem easily. Thank you!