On 8/15/2018 11:25 AM, Axel Lin wrote:
Hi list,
I'm testing a LTE module with lwIP and found always got bad fcs as below.
I dump the received data below:
Is there anything wrong in the received data?
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]␍␊
pppos_write[0]: len=26␍␊
pppos_input[0]: got 17 bytes␍␊
7e ff 3 80 21 1 1 16 3 6 81 6 83 6 6e db 7e ␍␍␊
pppos_input[0]: Dropping bad fcs 0x4114 proto=0x8021␍␊
That doesn't look like a good PPP packet.
ff 3 80 21 1 1 16 3 6 81 6 83 6 6e db
ff 03 = address and control field
80 21 = IPCP protocol ID
01 = Configure request
01 = Identifier
16 03 = SHOULD BE PACKET LENGTH
Patrick
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