[Ovmsdev] Network manager / DNS issue

[Michael Balzer]

Mark,

Am 03.01.2018 um 13:35 schrieb Mark Webb-Johnson:
> I left OVMS v3 running on my desk, connected via the cellular network here in Malaysia. It saw a bunch of connection drops, but overall managed to reconnect
> each time and be stable for 10 days. I think we’re close… Just need to deal with the edge case of modem rebooting and losing MUX connection.

Not sure if this is the edge case: if the connection is running over Wifi and the modem is idling, it will lose the ppp connection after some time. When it
does, the v2 server will also disconnect, although it's still connected via Wifi. When the ppp link then gets back up, occasionally the server reconnect will
fail continously with a DNS error:

…
I (21780828) ovms-server-v2: Send MP-0 h394,0,RT-GPS-Log,293916,86400,51.30231476,7.39006519,326,197,0,1,119,-105,0,0,0,0,0,0,40,19000,-2000,1.000,1.000,0,0
I (21780868) ovms-server-v2: Incoming Msg: MP-0 h394
I (21780868) notify: Cleanup type data id 394
I (21782818) simcom: PPP Connection disconnected
I (21782818) simcom: PPP Connection disconnected
I (21783008) simcom: Lost network connection (+PPP disconnect in NetMode)
I (21783008) simcom: State: Enter NetLoss state
I (21783008) gsm-ppp: Shutting down (hard)...
I (21783008) events: Signal(system.modem.down)
I (21783008) events: Signal(network.modem.down)
I (21783008) events: Signal(network.reconfigured)
I (21783008) ovms-server-v2: Network is down, so disconnect network connection
E (21783008) ovms-server-v2: Status: Error: Disconnected from OVMS Server V2
I (21788578) gsm-ppp: StatusCallBack: User Interrupt
I (21788578) gsm-ppp: PPP connection has been closed
I (21788578) events: Signal(system.modem.down)
I (21792008) simcom: State timeout, transition to 5
I (21792008) simcom: State: Enter NetWait state
I (21792008) gsm-nmea: Startup
I (21793018) ovms-server-v2: Connection is ovms.dexters-web.de:6867 TEST1/aeL1aN9j
W (21793018) net: DNS lookup on ovms.dexters-web.de failed err=202
E (21793028) ovms-server-v2: Status: Error: Cannot establish tcp/ip connection to server
I (21796008) simcom: State: Enter NetStart state
I (21797028) simcom: PPP Connection is ready to start
I (21798008) simcom: State: Enter NetMode state
I (21798008) gsm-ppp: Initialising...
I (21800268) gsm-ppp: StatusCallBack: None
I (21800268) gsm-ppp: status_cb: Connected
I (21800268) gsm-ppp:    our_ipaddr  = 10.170.195.13
I (21800268) gsm-ppp:    his_ipaddr  = 10.64.64.64
I (21800268) gsm-ppp:    netmask     = 255.255.255.255
I (21800268) gsm-ppp:    our6_ipaddr = ::
I (21800268) events: Signal(system.modem.gotip)
I (21800268) events: Signal(network.modem.up)
I (21800268) events: Signal(network.up)
I (21803028) ovms-server-v2: Connection is ovms.dexters-web.de:6867 TEST1/aeL1aN9j
W (21816078) net: DNS lookup on ovms.dexters-web.de failed err=202
E (21816078) ovms-server-v2: Status: Error: Cannot establish tcp/ip connection to server
I (21826078) ovms-server-v2: Connection is ovms.dexters-web.de:6867 TEST1/aeL1aN9j
W (21839118) net: DNS lookup on ovms.dexters-web.de failed err=202
E (21839118) ovms-server-v2: Status: Error: Cannot establish tcp/ip connection to server
I (21840008) notify: Raise text data: RT-GPS-Log,293916,86400,51.30231476,7.39006567,326,197,0,1,119,-101,0,0,0,0,0,0,40,19000,-2000,1.000,1.000,0,0
I (21840008) events: Signal(notify.data)
I (21849118) ovms-server-v2: Connection is ovms.dexters-web.de:6867 TEST1/aeL1aN9j
W (21862138) net: DNS lookup on ovms.dexters-web.de failed err=202
E (21862138) ovms-server-v2: Status: Error: Cannot establish tcp/ip connection to server

… and so on until manually restarting the Wifi or modem link.

Regards,
Michael

-- 
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