Latest Posts

Leaf Spine design based on CLOS Architecture

As we move towards the Cloud and the given disruptive changes in technology space there has been a lot of improvements changes in data center network architecture. Traditional Datacenter architectures are based on a three-tier architecture which consists of Access →Distributin →Core switches.T his worked well and there has been a lot of advantages to […]

ONOS tutorial with mininet :Part 2

As we have progressed through learning SDN essentials by installing ONOS and testing out a simple network topology with one switch and two hosts .Now its time to take it to another level by adding a routing in between . Note we wont be using any real simulated router in between for this setup as the intention […]

ONOS tutorial with mininet : Part 1

ONOS ONOS is an SDN controller specifically designed for service providers.Intention is to create a software defined network operating systems intended to integrate all network applications and functions in a viritualized format.The current ONOS version is 1.12.0. Mininet A network emulator which can create virtual switches,hosts and connect to SDN controllers. Mininet can be installed […]

VMware NSX-T 2.1 add supports for Kubernetes

  As noted by many industry veterans ,there is real need of matured network virtualization product in the container space.There are many opensource projects which has seen tremendous success in recent years like OPen daylight,Open contrail and ONOS. With all respect to the contributes of these solution there exists a big gap in the product […]

VMware NSX Controller is now Photon OS

    A welcome improvement from VMware as they changes controller OS which was based on Photon OS. Photon OS is a light weight Linux operating system .The need for such light weight system has been quite evident as the container technologies began to mature ,more and more developers are now developing and building their […]

Building modern web applications-Part 2

Nginx reverse proxy has been configured and service is running after the successful configuration of nginx.You might get a “Bad Gateway error “ .if we try to connect to nginx using web browser.This means packets are hitting nginx reverse proxy file ,but since our backend server is not initialized and started yet it is giving […]

Building modern web applications-Part 1

Stage: 1 – Building a three-tier web application on Google Cloud   The intent of this tutorial is getting comfortable with the app dependency flows of modern applications in the cloud and how to migrate flawlessly to the latest container based and serverless technologies. Application has always been the focal point in the enterprise datacenter.Even […]

OpenStack DB Error : (pymysql.err.InternalError) (1071,1071 – Specified key was too long; max key length is 767 bytes

Openstack Liberty DB Error : (pymysql.err.InternalError) (1071,1071 – Specified key was too long; max key length is 767 bytes   1) Replace all instances of ‘utf8mb4’ with ‘utf8’ in /etc/mysql/mariadb.conf.d/*2) Add the below to /etc/mysql/conf.d/mysqld_openstack.cnf: 3) Drop the keystone database 4) Restart mysql service 5) Run ‘keystone-manage db_sync’  Modify the files in /etc/mysql/mariadb.conf.d/ was also […]