LTE Modem log configuration

[Yann.P]

Hi there,
I need to collect modem logs to investigate LTE-M connectivity issues in specific countries.
I have been using the command AT%XMODEMTRACE=1,2 to activate them and I am using Wireshark to visualize them.

I am limited in the amount of data I am able to collect and I would like to reduce the verbosity of the logs to the following subset : AT, NAS-EPS, LTE RRC, IP (actually I would need to only collect the traces that can be viewed with Wireshark).

The documentation about the AT%XMODEMTRACE command advises to connect with the support team in order to use the <bitmap_id> and <bitmap> fields and there is no documentation about these fields.

Can you advise me what parameters I should use to limit to the logs to the subset mentioned above ?

Thanks a lot,

Yann

[Charlie]

Hi Yann,

Our developer actually did some trials with mfw 1.3.6. Here is the reply:

I run a short iperf test and collecting traces with XMODEMTRACE=1,2 and with the below mentioned AT commands

AT%XMODEMTRACE=0

AT%XMODEMTRACE=2,,0,"0000000000000000c000f000000000"

AT%XMODEMTRACE=2,,3,"010400000000400000000000000000000000000000e001000000000000000000000000"

AT%XMODEMTRACE=2,,4,"06"

The recorded binary log file size reduced from 2.6MB → 550kB

The first AT%XMODEMTRACE=0 will disable all traces, then the next three will enable a few trace groups, buffers and peer buffer traces.

The pcaps created with the XMODEMTRACE=1,2 and with the above bitmaps looked the same, so I’m hoping this could be a good set.

The produced binary log (we use the strc format) is still 2x bigger than the produced pcap file, because there are some unneeded traces which we unfortunately cannot deactivate.

Could you give a try with MFW v1.3.6?

Best regards,

Charlie

[Yann.P]

Thank you very much Charlie,
I have tested the new set of command and it works really great !
I have a reduced binary file but still have all the information I need.

Thanks a lot,

Yannick

[Charlie]

Thanks for the update. Good to hear it works now.

Best regards,

Charlie