The following table describes the TCP protocol options. Default values work well unless application tuning is required.
| Attribute | Default | Type | Description |
|---|---|---|---|
| lwip_tcp | true | Boolean | Require TCP. |
| tcp_ttl | 255 | Integer | TCP TTL value. |
| tcp_wnd | 2048 | Integer | TCP Window size in bytes. |
| tcp_maxrtx | 12 | Integer | TCP Maximum retransmission value. |
| tcp_synmaxrtx | 4 | Integer | TCP Maximum SYN retransmission value. |
| tcp_queue_ooseq | 1 | Integer | Accept TCP queue segments out of order. Set to 0 if your device is low on memory. |
| tcp_mss | 1460 | Integer | TCP Maximum segment size. |
| tcp_snd_buf | 8192 | Integer | TCP sender buffer space in bytes. |