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| From: | Patrick Klos |
| Subject: | Re: [lwip-users] PPP: IPCP bad fcs issue |
| Date: | Wed, 15 Aug 2018 15:40:22 -0400 |
| User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 |
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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 03 = address and control fieldff 3 80 21 1 1 16 3 6 81 6 83 6 6e db 80 21 = IPCP protocol ID 01 = Configure request 01 = Identifier 16 03 = SHOULD BE PACKET LENGTH Patrick |
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