Network namespaces in 5 min

Welcome to this brief reading of Network namespaces in 5 min. You will find answer for questions like: What are they? How they works? How they can be configured? Reader would need some understanding of Linux. If you want to know more about this sort things check my playlist “Great presentations and demos of K8s…

Cisco releases Cloud Native SD-WAN solution for Kubernetes

Cisco has introduced an open-source project that it says could go a long way toward reducing the manual work involved in optimizing performance of Kubernetes-applications across  SD-WANs (announced at KubeCon Europe 2020)  Cisco said it launched the Cloud-Native SD-WAN (CN-WAN) project to show how Kubernetes applications can be automatically mapped to SD-WAN with the result…

Introduction to BGP and cloud networking

This post is intended for people that is just entering to BGP and cloud networking (i.e. SDN). We’ll bring an introduction to BGP fundamental concepts.  BGP is fundamental for SDN to scale out large networks in the Datacenter for end-points attached to containers and virtual servers. Border Gateway Protocol (BGP) Let’s start saying that BGP…

Introduction to QoS and Cloud Networking

Relevant technologies like DPDK or SmartNICs are starting to come up lately to bring better performance options to CNF/VNF instances. Sharing a Linux kernel among other applications, is not good enough for some network functions. However, there are still other options before considering replacing your hardware. Quality of Service or QoS could be the cheapest…

Keep using Layer-2 services with EVPN

Let’s say you need a more scalable layer-2 solution for your VMs and containers. You can do some Linux bridges or maybe use OVS and try some VxLAN/GRE encapsulation between Hypervisors. Containers is a different kind of animal though: Way more end-points in every server and we put them across the datacenter, it could turn…

how-to use virt-install to connect at openvswitch bridge

Very simple question with an answer that is hard to find: how-to use virt-install to connect at openvswitch bridge. I am using Centos version 7 as my KVM host. After some testing and time searching. I got this. In a few words. Just add “virtualport_type=openvswitch” to your network settings. After you have downloaded your qcow2…

Useful Nuage VRS and VSC commands

If you have Nuage SDN in your cloud then you’ll appreciate this post that give you guidelines in how to check out what is happening actually. Here you have some useful Nuage VRS and VSC commands that will help you out. Useful Nuage VRS Commands Check out Nuage VRS ports and VXLAN tunnels information To…