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Date:      Wed, 11 Dec 2019 11:41:50 -0500
From:      mike tancsa <mike@sentex.net>
To:        Adrian Gschwend <ml-ktk@netlabs.org>, freebsd-questions@freebsd.org
Subject:   Re: u3g Sierra Wireless LTE device disconnects ppp after 2-3MB of outgoing traffic
Message-ID:  <3cbe8ef9-4800-bfc0-ba34-c2ca56c74e17@sentex.net>
In-Reply-To: <8d25dd77-7c71-5a4a-2f2e-78c541e3fb9c@netlabs.org>
References:  <972e8912-0ed7-63c8-d079-c11b12f8c9ad@netlabs.org> <6e6176d5-c9c5-b38a-0fe6-8b21c9c33824@sentex.net> <6d5e9963-bdfe-81b3-73be-6ee349f9091e@netlabs.org> <56eb59b2-6cbb-cfb0-4594-46644aee7164@sentex.net> <8d25dd77-7c71-5a4a-2f2e-78c541e3fb9c@netlabs.org>

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On 12/11/2019 11:34 AM, Adrian Gschwend wrote:
> On 11.12.19 21:24, mike tancsa wrote:
>
>> Do you have LQR/ech enabled ?  Here is the ppp.conf section I use
> yeah, it's pretty much based on what you proposed, main change was APN.
>
> Later I did add
>
> set reconnect 3 5
>
> Hoping that this adds something but apparently it does not.


How are you starting ppp ?  ppp -ddial target ?

>> Depending on your modem, some Sierra's dont allow the GSTATUS command
>> from the management port, just signal info. Eg. port /dev/cuaU0.3 is my
>> data port to make my ppp connection on, I can connect to cuaU1.4 to ask
>> some basic info like signal.  Sierra should have a pretty good AT
>> command set manual free to download so you can see what is exactly
>> available.
> yes I have that one.
>
>> % cu -l /dev/cuaU1.4
>> Connected
>> Sierra Wireless, Incorporated
>> MC7700
>> APP1
>>
>> OK
>> +CSQ: 21,99
>> OK
> That does not work on mine, on 2 I get "all ports are connected" but
> that's where PPP is running on. On the others I get "connected" but
> never any output (and also no echo)
on cuaU1.4 just type

ati <enter>

You wont see what you type, but you should get MCC7700. Does that not work ?

>
>> for whatever reason, ate1 is not respected, so my commands dont show.
>> the above is the output of entering ati and at+csq
> I've seen that too
>
>>  set lqrperiod 10
>>  enable lqr
>>  enable echo
>>
>> should allow ppp to reconnect should ppp disconnect.
> unfortunately it doesn't. The link seems still up but absolutely nothing
> goes through anymore.
>
> The only thing I can do is kill ppp and restart it, then I have a link
> again immediately.

your ppp logs should show you something when the connection dies. Whats
in the logs ?





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