issue in connection's status

[alexander.sorvin at shbp.ru]

Hello!
I'm waiting for the connection status to change for more then 5 min.
I use load balancing and that timeout is very critical for me (even 30 sec. is too long for me). How can I change it?

29.08.2016, 20:01, "Dan Williams" <dcbw at redhat.com>:
> On Mon, 2016-08-29 at 17:00 +0300, alexander.sorvin at shbp.ru wrote:
>>  Hello!
>>
>>  We use a modem Sierra MC7304 (at!udusbcomp=6  at!scact=1,1) . Connect
>>   with the command: qmicli -d /dev/cdc-wdm0 --client-no-release-cid
>>  To get ip address: dhclient wwan0
>>  Then I remove the antenna from the modem in order to achieve a
>>  connection loss. The response from the ping stops flowing, but the
>>  status still shows that there is a connection. Where is a fault?
>
> How long are you waiting for the connection status to change?  Modems
> often have large timeouts to paper over network dropouts like
> insufficient coverage, short tunnels, etc and not drop the packet data
> connection and thus IP address and such.  If it doesn't drop after an
> hour then I'd say there's an issue, but I would expect at least 30
> seconds or so of no signal without reporting a disconnect.
>
> Dan
>
>>  sudo qmicli -d /dev/cdc-wdm0 --wds-get-packet-service-status
>>  [/dev/cdc-wdm0] Successfully got serving system:
>>  Registration state: 'registered'
>>  CS: 'attached'
>>  PS: 'attached'
>>  Selected network: '3gpp'
>>  Radio interfaces: '1'
>>  [0]: 'lte'
>>  Roaming status: 'off'
>>  Data service capabilities: '1'
>>  [0]: 'lte'
>>  Current PLMN:
>>  MCC: '250'
>>  MNC: '2'
>>  Description: 'MegaFon'
>>  Roaming indicators: '1'
>>  [0]: 'off' (lte)
>>  3GPP location area code: '65534'
>>  3GPP cell ID: '253764101'
>>  Detailed status:
>>  Status: 'available'
>>  Capability: 'cs-ps'
>>  HDR Status: 'power-save'
>>  HDR Hybrid: 'yes'
>>  Forbidden: 'no'
>>  LTE tracking area code: '9913'
>>  Full operator code info:
>>  MCC: '250'
>>  MNC: '2'
>>  MNC with PCS digit: 'no'
>>
>>  sudo qmicli -d /dev/cdc-wdm0 --nas-get-serving-system
>>
>>  [/dev/cdc-wdm0] Successfully got system info:
>>  GSM service:
>>  Status: 'none'
>>  True Status: 'none'
>>  Preferred data path: 'no'
>>  WCDMA service:
>>  Status: 'none'
>>  True Status: 'none'
>>  Preferred data path: 'no'
>>  LTE service:
>>  Status: 'limited'
>>  True Status: 'available'
>>  Preferred data path: 'no'
>>  Domain: 'cs-ps'
>>  Service capability: 'cs-ps'
>>  Roaming status: 'off'
>>  Forbidden: 'yes'
>>  Cell ID: '197157636'
>>  MCC: '250'
>>  MNC: '99'
>>  Tracking Area Code: '3877'
>>  Voice support: 'no'
>>  eMBMS coverage info support: 'no'
>>  SIM reject info: 'vailable'
>>
>>  sudo qmicli -d /dev/cdc-wdm0 --wds-get-packet-service-status
>>
>>  [/dev/cdc-wdm0] Connection status: 'connected'
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