LTE debugging

RouterOS Beginner Basics
1

I’m trying to test setup my routerOS7 to create a link to the internet using an lte interface

Inserted the stick in usb, lte was detected
Did the Quick Set setup, entered AP and PIN
The Intf received IP address 192.168.8.105
default IP route was added to 192.168.8.1 this was done automatic

I cannot sent a bit over the link, I normally ping ccn website as this one always responds 151.101.3.5 but I keep getting timeouts
Timeout or net unreachable

Almost certain I’m missing something small

2

yes the sim card was tested using a smartphone :slight_smile:

3

Is lte interface in WAN interface list?

4

yes

[admin@MikroTik] > /interface list/ member/ print
Columns: LIST, INTERFACE

LIST INTERFACE

;;; defconf
0 LAN bridge
1 WAN lte1

5

There is a known issue (actually a non-issue if you know about it) about the settings for network APN, they are somewhat counterintuitive, check
http://forum.mikrotik.com/t/sxt-lte6-kit-beginner-problems/177959/1

6

I have tested that one also, but now tested using the cli and sorry but same issue
I receive ip address on that lte interface but routing simple stops

7

all seems ok but pings are failing, also if I connect as a user via the lan it fails



[admin@MikroTik] /ip/route> print 
Flags: D - DYNAMIC; A - ACTIVE; c - CONNECT, s - STATIC, d - DHCP; + - ECMP
Columns: DST-ADDRESS, GATEWAY, DISTANCE
#      DST-ADDRESS      GATEWAY      DISTANCE
0  As+ 0.0.0.0/0        lte1                1
  DAd+ 0.0.0.0/0        192.168.8.1         1
  DAc  192.168.8.0/24   lte1                0
  DAc  192.168.88.0/24  bridge              0
8

IDK for sure but USB stick modem is likely in “ECM” mode, not MBIM modem. In ECM mode, compatibility to set APN stuff / get stats is limited to specific hardware – so APN setting may not be doing anything (as reported).

ECM mode basically presents an ethernet interface, and in lot of cases act like a NAT router. Why your getting 192.168.8.0/24 private subnet, instead of CGNAT or public IP… You might try going to 192.168.8.1 from a web browser, it may have a web UI to set the modem. Or you may be able to use in Windows to set the modem. Really depends on specific modem you have.

Ideally you might be able to put the modem in MBIM mode – which is what you’d want for RouterOS.

What specific USB modem do you have? Is is listed (or close) to one listed here: https://help.mikrotik.com/docs/spaces/ROS/pages/13500447/Peripherals#Peripherals-Cellularmodems

9

this was the trick, browse to the modem, enter pin check a few other settings and BAM connected !!!

Tnx !!! Can I like your reply via this post :wink:

10

The solved “closes” it. But if you don’t mind, can you still post the output of:

/interface/lte/show-capabilities [find]

…just to know what RouterOS thinks about this particular modem… I’m not sure what it report in the case of your ECM USB LTE modem “stick” … so just good if that was known/shared.

If you know the specific model, that be good to know too. In some cases… it might be possible to get into MBIM mode… which at least remove the double-NAT situation. Now, a lot of times that may not be too helpful, since LTE carrier may still use a CGNAT which still port block incoming ports, so another NAT isn’t making thing worse in a lot of cases.

11 
[admin@MikroTik] > /interface/lte/show-capabilities [find]
  modem-bus-location: 1-1      
           cell-scan: no       
        network-scan: no       
  apn-address-family: IPv4,IPv6
       max-apn-count: 1        
           rat-modes:          
      band-selection: no       
         passthrough: no       
     firmware-update: no       
   lte-attach-config: no       
             at-chat: no