tools: nfdc help command
refs #3780
Change-Id: Ibd0e37bad127a38e582864fadd81afadc74baf48
diff --git a/docs/manpages/nfdc-strategy.rst b/docs/manpages/nfdc-strategy.rst
new file mode 100644
index 0000000..1f1c292
--- /dev/null
+++ b/docs/manpages/nfdc-strategy.rst
@@ -0,0 +1,44 @@
+nfdc-strategy
+=============
+
+SYNOPSIS
+--------
+| nfdc strategy [list]
+| nfdc set-strategy <prefix> <strategy>
+| nfdc unset-strategy <prefix>
+
+DESCRIPTION
+-----------
+In NFD, packet forwarding behavior is determined by forwarding pipelines and forwarding strategies.
+The forwarding pipelines define general steps of packet processing.
+Forwarding strategies provide the intelligence to make decision on whether, when, and where
+to forward Interests.
+
+NFD contains multiple forwarding strategy implementations.
+The strategy choice table determines which strategy is used in forwarding an Interest.
+
+The **nfdc strategy list** command shows the strategy choices.
+
+The **nfdc set-strategy** command sets the strategy for a name prefix.
+
+The **nfdc unset-strategy** command clears the strategy choice at a name prefix,
+so that a strategy choice at a shorter prefix or the default strategy will be used.
+It undoes a prior **nfdc set-strategy** command on the same name prefix.
+
+OPTIONS
+-------
+<prefix>
+ The name prefix of a strategy choice.
+ The strategy choice is effective for all Interests under the name prefix,
+ unless overridden by another strategy choice.
+ Specifying ``ndn:/`` as the prefix in **nfdc set-strategy** changes the default strategy.
+ Specifying ``ndn:/`` as the prefix in **nfdc unset-strategy** is disallowed,
+ because NFD must always have a default strategy.
+
+<strategy>
+ A name that identifies the forwarding strategy.
+ Consult NFD Developer's Guide for a complete list of all implemented strategies.
+
+SEE ALSO
+--------
+nfd(1), nfdc(1)