I have MC7355 (firmware SWI9X15C_05.05.58.00) being used in MBIM mode with Mikrotik SXT R router with Router OS 7.1. I have been working with Mikrotik support for last 6 weeks to figure out connection deactivation and after latest review of my log files, I was told the issue is with MBIM implementation on the modem and to reach out to Sierra Wireless support.
Here is the email I received from Mikrotik Support:
Hello,
We have investigated the log files, the issue seems to be on the modem side.
From MBIM specification: The device must send appropriate event notifications whenever the activation state changes.
In this case we do not see the correct notifications from the modem side that the MBIM implementation would react to, so the connection is not reactivated and sends an error.
It looks like it is missing an activation notify, or another deactivation notify, as the status from modem side is still on activating.
Please contact Sierra support regarding this issue and provide the MBIM log, this should be resolved with a new Sierra firmware version.
Regards,
Emīls T.
This is my 1st post, so I can not attach the log file, but here is the relevant part.
09:03:01 lte,debug lte1 mbim: ip config #0 15,0
**09:03:01 lte,info lte1: IPV4: 100.66.113.254, DNS: 2**
09:03:01 lte,debug lte1 mbim: state 15=>16
**09:03:01 interface,info lte1 link up**
09:03:04 lte,packet,raw lte1 mbim: wdm <<< recv #0
09:03:04 lte,packet,raw 07000080 50000000 00000000 01000000
09:03:04 lte,packet,raw 00000000 a289cc33 bcbb8b4f b6b0133e
09:03:04 lte,packet,raw c2aae6df 0c000000 24000000 00000000
09:03:04 lte,packet,raw 03000000 00000000 00000000 7e5e2a7e
09:03:04 lte,packet,raw 4e6f7272 736b656e 7e5e2a7e 00000000
09:03:04 lte,debug lte1 mbim: <<< N service: connect, command: connect
09:03:04 lte,packet lte1 mbim: status data:
09:03:04 lte,packet 00000000 03000000 00000000 00000000
09:03:04 lte,packet 7e5e2a7e 4e6f7272 736b656e 7e5e2a7e
09:03:04 lte,packet 00000000
**09:03:04 lte,debug lte1 mbim: connect: #0 deactivated**
09:03:04 lte,debug lte1 mbim: do connect #0 1
09:03:04 lte,debug lte1 mbim: apn: VSBLINTERNET
09:03:04 lte,debug lte1 mbim: >>> S service: connect, command: connect
09:03:04 lte,packet,raw lte1 mbim: wdm >>> send #11
09:03:04 lte,packet,raw 03000000 84000000 0b000000 01000000
09:03:04 lte,packet,raw 00000000 a289cc33 bcbb8b4f b6b0133e
09:03:04 lte,packet,raw c2aae6df 0c000000 01000000 54000000
09:03:04 lte,packet,raw 00000000 01000000 3c000000 18000000
09:03:04 lte,packet,raw 00000000 00000000 00000000 00000000
09:03:04 lte,packet,raw 00000000 00000000 01000000 7e5e2a7e
09:03:04 lte,packet,raw 4e6f7272 736b656e 7e5e2a7e 56005300
09:03:04 lte,packet,raw 42004c00 49004e00 54004500 52004e00
09:03:04 lte,packet,raw 45005400
**09:03:04 interface,info lte1 link down**
09:03:04 lte,packet,raw lte1 mbim: wdm <<< recv #0
09:03:04 lte,packet,raw 07000080 50000000 00000000 01000000
09:03:04 lte,packet,raw 00000000 a289cc33 bcbb8b4f b6b0133e
09:03:04 lte,packet,raw c2aae6df 0c000000 24000000 00000000
09:03:04 lte,packet,raw 02000000 00000000 01000000 7e5e2a7e
09:03:04 lte,packet,raw 4e6f7272 736b656e 7e5e2a7e 00000000
09:03:04 lte,debug lte1 mbim: <<< N service: connect, command: connect
09:03:04 lte,packet lte1 mbim: status data:
09:03:04 lte,packet 00000000 02000000 00000000 01000000
09:03:04 lte,packet 7e5e2a7e 4e6f7272 736b656e 7e5e2a7e
09:03:04 lte,packet 00000000
**09:03:04 lte,debug lte1 mbim: connect: #0 activating**
09:03:04 lte,packet,raw lte1 mbim: wdm <<< recv #11
09:03:04 lte,packet,raw 03000080 54000000 0b000000 01000000
09:03:04 lte,packet,raw 00000000 a289cc33 bcbb8b4f b6b0133e
09:03:04 lte,packet,raw c2aae6df 0c000000 02000000 24000000
09:03:04 lte,packet,raw 00000000 03000000 00000000 00000000
09:03:04 lte,packet,raw 7e5e2a7e 4e6f7272 736b656e 7e5e2a7e
09:03:04 lte,packet,raw 00000000
**09:03:04 lte,info lte1 mbim: error: <<< E service: connect, command: connect, error: 2**
09:03:04 lte,packet lte1 mbim: status data:
09:03:04 lte,packet 00000000 03000000 00000000 00000000
09:03:04 lte,packet 7e5e2a7e 4e6f7272 736b656e 7e5e2a7e
09:03:04 lte,packet 00000000
Thank you for any help you can provide.