Kategorie: Linux Networking

All around Linux networking

Switching Performance – Chaining OVS bridges

The Openvswitch installed on a Linux system provides the feature to configure multiple bridges. Multiple OVS bridges behave like independent local switches. This is the way OVS is providing switch virtualization. It is possible to chain multiple OVS bridges on one system. Chaining multiple bridges is used by Openstack neutron, when using the default networking […]

Updated: 04/12/2014 — 21:33

Openstack Neutron using VXLAN

The networking part of Openstack provides several models for the L2 networks to be used as L2 tenant broadcast domains. An overlay network can be used to separate the MAC addresses and „vlans“ of the tenant networks from the transport layer network. Openstack neutron in Havana supports two overlay network technologies, GRE and VXLAN. VXLAN […]

Updated: 01/02/2015 — 14:45

How to find namespaces in a Linux system

Namespaces in Linux are heavily used by many applications, e.g. LXC, Docker and Openstack. Question: How to find all existing namespaces in a Linux system? The answer is quite difficult, because it’s easy to hide a namespace or more exactly make it difficult to find them. Exploring the system In the basic/default setup Ubuntu 12.04 […]

Updated: 26/07/2014 — 08:42