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+.. _grpc:
+
+***************
+Northbound gRPC
+***************
+
+.. program:: configure
+
+*gRPC* provides a combined front end to all FRR daemons using the YANG
+northbound. It is currently disabled by default due its experimental
+stage, but it can be enabled with :option:`--enable-grpc` option in the
+configure script.
+
+
+.. _grpc-features:
+
+Northbound gRPC Features
+========================
+
+* Get/set configuration using JSON/XML/XPath encondings.
+* Execute YANG RPC calls.
+* Lock/unlock configuration.
+* Create/edit/load/update/commit candidate configuration.
+* List/get transactions.
+
+
+.. note::
+
+   There is currently no support for YANG notifications.
+
+
+.. note::
+
+   You can find more information on how to code programs to interact
+   with FRR by reading the gRPC Programming Language Bindings section
+   in the `developer's documentation
+   <http://docs.frrouting.org/projects/dev-guide/en/latest/grpc.html>`_.
+
+
+.. _grpc-config:
+
+Daemon gRPC Configuration
+=========================
+
+The *gRPC* module accepts the following run time option:
+
+- ``port``: the port to listen to (defaults to ``50051``).
+
+
+.. note::
+
+   At the moment only localhost connections with no SSL/TLS are
+   supported.
+
+
+To configure FRR daemons to listen to gRPC you need to append the
+following parameter to the daemon's command line: ``-M grpc``
+(optionally ``-M grpc:PORT`` to specify listening port).
+
+To do that in production you need to edit the ``/etc/frr/daemons`` file
+so the daemons get started with the command line argument. Example:
+
+::
+
+   # other daemons...
+   bfdd_options="  --daemon -A 127.0.0.1 -M grpc"