Explain Switcher and Router funtionality

Author: mangledbottles

Server/README.md

@@ -1,5 +1,5 @@
 # Switcher and Router
-This folder is the source code for the Switcher and Routers.
+This folder is the source code for the Switcher and Routers on the OpenFlow Protocol Network.
 
 ## Installation
 ```
@@ -11,6 +11,33 @@ npm run switcher
 # Start a Router (can start as many as you want)
 npm run router
 ```
+
+## Switcher
+`Switcher.ts`
+
+The Switcher is a NodeJS application that listens on port 51510 for OpenFlow messages. The Switcher is responsible for managing the Routers and Clients.
+
+The Switcher contains a FlowTable that is used to control the flow of traffic between Clients and Routers.
+| Router | In | Out |
+|--------|----|-----|
+| R1 | E1 | R2 |
+| R2 | R1 | R2 |
+| R3 | R2 | E2 |
+
+
+## Router
+`Router.ts`
+
+The Router is a NodeJS application that can be started as many different processes to create multiple OpenFlow layers that connect together.
+
+When a new Router process is created, it will send a message to the Switcher to connect and if successful, it will be added to the FlowTable.
+
+If the Router is #1 on the network, its details will be stored and forwarded to the Client once they join the network. 
+
+When the network is filled out with 2 other Routers and a receiving Client, the initial Client can send a message to the receiving Client and the message will be forwarded the #1 Router.
+
+Router #1 will then forward the message to Router #2 and Router #2 will forward the message to Router #3 and Router #3 will forward the message to the receiving Client.
+
 ## Dockerising the Switcher
 ![Dockerfile](../Assets/Dockerfile.png)
 
@@ -20,10 +47,4 @@ docker build -t dermot/openflow:1.0 .
 
 # Run the Docker image inside a container
 docker run -it --rm --name openflow -p 51510:51510 dermot/openflow:1.0
-```
-
-## Switcher
-The Switcher is a NodeJS application that listens on port 51510 for OpenFlow messages.
-
-## Router
-The Router is a NodeJS application that can be started as many different processes to create multiple OpenFlow layers that connect together.
+```