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Introduction

In this article, we are going to show you how to setup an development environment for CORD Fabric without using pre-installed VM.

ONOS

Setup an ONOS cluster with 3 instances. Here we only show brief steps. Please refer to Installing and Running ONOS for detail.

1. Fetch and compile ONOS

2. Enable Segment Routing applications in your cell configuration:

   Code Block
   language text
   ONOS_APPS=drivers,openflow,segmentrouting

3. Configure Segment Routing

   Info
   We plan to replace the configuration file with Network Configuration Subsystem in a near future

   Attached segmentrouting.conf is already modify for the 4-by-4 leaf-spine topology we are going to use.
   Copy it to:

   No Format
   onos/tools/package/config/segmentrouting.conf

   You can also use copy and modify from a sample at:

   No Format
   onos/tools/package/config/samples/segmentrouting.conf

4. Package, install and start ONOS

Mininet and CpqD Software Switch

1. Install Mininet from source code. Please refer to Install Mininet from source code for detail.

   Code Block
   language text title Fetch Mininet
   $ git clone git://github.com/mininet/mininet $ cd mininet $ git checkout -b 2.2.1 2.2.1

2. Patch Mininet.

   Info
   We will probably commit this back to the Mininet main stream.

   A patch multi_controller.patch is required to allow CpqD software switches to connect to multiple controller instances simultaneously. 
   Apply the patch using:

   Code Block
   language text title Patch Mininet
   # In the Mininet root directory  $ git apply multi_controller.patch

3. Install Mininet and CpqD Software Switch

   Code Block
   title Install Mininet
   $ sudo ./util/install.sh -n

CpqD Software Switch

1. Install CpqD

   Code Block
   title Install CpqD
   $ git clone https://github.com/CPqD/ofsoftswitch13.git $ cd ~/ofsoftswitch13 $ ./boot.sh $ ./configure $ make $ sudo make install3fn

Start the Fabric

1. Start the Fabric
   We write a Mininet script cord_fabric.py that can help you easily create a leaf-spine topology with CpqD software switches.

   Tip
   title Check cell configuration
   Since cord_fabric.py reads controller information from cell configuration, you should check your cell and see if $OC[1-9] is correctly set up before running the script.

   Code Block
   title Start the leaf-spine topology
   $ sudo -s #E ./cord_fabric.py --spine=4 --leaf=4

2. Run pingall

   Code Block
   title Test host connectivity
   mininet> pingall

   Note
   Communication between hosts in the same rack (i.e. in the same subnet) is L2 bridged (not segment-routed). Unfortunately, we have not implemented this functionality yet. As a result pinging between hosts in the same rack (e.g. h1 and h2) will not work

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