| .. _ppp: |
| |
| Point-to-Point Protocol (PPP) Support |
| ##################################### |
| |
| .. contents:: |
| :local: |
| :depth: 2 |
| |
| Overview |
| ******** |
| |
| `Point-to-Point Protocol |
| <https://en.wikipedia.org/wiki/Point-to-Point_Protocol>`_ (PPP) is a data link |
| layer (layer 2) communications protocol used to establish a direct connection |
| between two nodes. PPP is used over many types of serial links since IP packets |
| cannot be transmitted over a modem line on their own, without some data link |
| protocol. |
| |
| In Zephyr, each individual PPP link is modelled as a network interface. This |
| is similar to how Linux implements PPP. |
| |
| PPP support must be enabled at compile time by setting option |
| :option:`CONFIG_NET_PPP` and :option:`CONFIG_NET_L2_PPP`. |
| |
| See also the :zephyr_file:`samples/net/sockets/echo_server/overlay-ppp.conf` |
| file for configuration option examples. |
