Posted in Cloud, network, Openstack

Basic networking in Openstack Part 1

Once you install Openstack in single node or multinode setup next thing is to setup network. To understand networking in Openstack is little tedious job. This post is to describe basic Openstack networking concept by creating internal/external networking and testing the same.

First delete all default network like public and private which were created by default after Openstack installation using

#neutron net-delete <net-name>

Let us create new internal network first.


Create subnet for network private-net with subnet address


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Posted in Linux, network

Network Configuration in RHEL 7/Centos 7

In this post I am going to show how to do network configuration in rhel7/centos7. We have ip command introduced in linux way back but we never used it. In this post we will use ip related commands which isnot easy to use as it has many options need to provide to get relevant output.

to see IP address details normally we used ifconfig command we check the same using ip addr show command.


Here we an see ipv4 address of eth0 interface along with ipv6 address and network UP status and mtu size.
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