SDFAB-597 Add topology scaling figure
Change-Id: I7401da7d5433813359229ace323b06e01065824a
diff --git a/images/topology-scale.png b/images/topology-scale.png
new file mode 100644
index 0000000..843a571
--- /dev/null
+++ b/images/topology-scale.png
Binary files differ
diff --git a/specification.rst b/specification.rst
index bfe6c6a..0e21a7b 100644
--- a/specification.rst
+++ b/specification.rst
@@ -89,38 +89,47 @@
--------
SD-Fabric can start at the smallest scale (single leaf) and grow horizontally.
+.. image:: images/topology-scale.png
+ :width: 900px
+
+
Single Leaf (ToR)
-----------------
This is the minimum SD-Fabric setup. In this setup, all servers are connected to a single switch.
.. image:: images/topology-single.png
+ :width: 160px
-Paired Leaf (Dual-Homing)
--------------------------
+Single Leaf Pair (Dual-Homing)
+------------------------------
Compared to single switch, it provides more redundancy in terms of server NIC failure and link failure.
.. image:: images/topology-pair.png
+ :width: 225px
Leaf-Spine (without pairing)
----------------------------
Compared to single switch, it offers more redundancy in terms of switch failure and provides better scalability.
.. image:: images/topology-2x2.png
+ :width: 300px
Leaf-Spine (with pairing)
-------------------------
It supports all the redundancy and scalability features mentioned above.
.. image:: images/topology-2x4.png
+ :width: 450px
Multi-Stage Leaf-Spine
----------------------
Multi-stage is specifically designed for telco service providers.
-The first stage can be installed in the central office,
-while the second stage can be installed in a field office that is closer to the subscribers.
+The first stage can be installed in the central office, while the second stage
+can be installed in a field office that is closer to the subscribers.
Two stages are typically connected via long distance optical transport.
.. image:: images/topology-full.png
+ :width: 700px
Resiliency
----------
