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46 lines
1.4 KiB
46 lines
1.4 KiB
.. _ppp: |
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Point-to-Point Protocol (PPP) Support |
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##################################### |
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.. contents:: |
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:local: |
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:depth: 2 |
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Overview |
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******** |
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`Point-to-Point Protocol |
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<https://en.wikipedia.org/wiki/Point-to-Point_Protocol>`_ (PPP) is a data link |
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layer (layer 2) communications protocol used to establish a direct connection |
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between two nodes. PPP is used over many types of serial links since IP packets |
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cannot be transmitted over a modem line on their own, without some data link |
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protocol. |
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In Zephyr, each individual PPP link is modelled as a network interface. This |
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is similar to how Linux implements PPP. |
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PPP support must be enabled at compile time by setting option |
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:kconfig:option:`CONFIG_NET_L2_PPP`. |
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The PPP implementation supports only these protocols: |
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* LCP (Link Control Protocol, |
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`RFC1661 <https://tools.ietf.org/html/rfc1661>`__) |
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* HDLC (High-level data link control, |
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`RFC1662 <https://tools.ietf.org/html/rfc1662>`__) |
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* IPCP (IP Control Protocol, |
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`RFC1332 <https://tools.ietf.org/html/rfc1332>`__) |
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* IPV6CP (IPv6 Control Protocol, |
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`RFC5072 <https://tools.ietf.org/html/rfc5072>`__) |
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For using PPP with a cellular modem, see :zephyr:code-sample:`cellular-modem` sample |
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for additional information. |
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Testing |
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******* |
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See the `net-tools README`_ file for more details on how to test the Zephyr PPP |
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against pppd running in Linux. |
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.. _net-tools README: |
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https://github.com/zephyrproject-rtos/net-tools/blob/master/README.md#ppp-connectivity
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