[UART2]: PPP event IP_FAILURE


#1

Hi guys,

I’m trying to connect dialup modem to UART2 by making PPP connection. Making PPP connection using PC to the modem is fine but when I try to make PPP connection through Q26, after around 30seconds it gives UART2 PPP EVENT IP_FAILURE.

So when I start the UART2 bearer I get:

at+wipbr=4,2,0
OK
[UART2]: PPP start: -> PPP CONNECTING
[UART2]: start: -> CONNECTING
[UART2]: PPP event LINK_UP
[UART2]: PPP event IP_UP: -> PPP CONNECTED
[UART2]: -> CONNECTED

I got IP address as well as DNS address from the ISP. It seems all fine, but after about 30 seconds (always around 30 seconds) I get:

첱Pø2]: PPP event IP_FAILURE
[UART2]: PPP event IP_DOWN
[UART2]: PPP event LINK_DOWN -> PPP DISCONNECTED
[UART2]: IPCP negociation failure
[UART2]: -> PEER DISCONNECTING

+CME ERROR: 815
[UART2]: -> DISCONNECTED

Error 815 is PPP IPCP negotiation failure. But according to the message above, it’s caused by IP FAILURE but I have no idea what IP_FAILURE means at all. I don’t think it’s the modem at all because when the connection is made through PC, it’s totally fine. I think it’s something to do with Q26 settings.

When I am connected, during that 30 seconds I’ve tried making TCP socket as well as ping google etc but I get time outs (Error 842) so I guess it’s safe to assume the connection is not fully established.

I’ve tried altering parameters in the WIPCFG but makes absolutely no difference.

Any help would be very very appreciated.

Thanks