docs: FIB 2.0 start

Change-Id: I87cd2eae133c9f5b9f7764a0f7a41bcc28523e4c
Signed-off-by: jdenisco <jdenisco@cisco.com>
diff --git a/docs/gettingstarted/developers/fib20/prerequisites.rst b/docs/gettingstarted/developers/fib20/prerequisites.rst
new file mode 100644
index 0000000..9d2b5ca
--- /dev/null
+++ b/docs/gettingstarted/developers/fib20/prerequisites.rst
@@ -0,0 +1,12 @@
+.. _prerequisites:
+
+Prerequisites
+-------------
+
+This section describes some prerequisite topics and nomenclature that are
+foundational to understanding the FIB architecture.
+
+.. toctree::
+
+   graphs
+   prefixes