cloud Archives - Network Engineer Blog – Giang Pham | CCIEx2 #42780 (SP,DC) | AWS

(2/3) A deep-dive into OpenStack networking with Cisco ACI Opflex integration – Neutron DHCP/Metadata optimizations

Posted on June 1, 2020September 7, 2020 by GP

This is part 2 of the deep-dive series into OpenStack networking with Cisco ACI Opflex integration. In the previous post, I have described the different integration modes between ACI and OpenStack (ML2 vs. GBP, OpFlex vs. non OpFlex). We have also seen the constructs (tenants/VRF/BD/EPG/contracts) that the plugin creates automatically on ACI when we create OpenStack objects, as well as the distributed routing feature of the OpFlex OVS.

In this part, we will do some deep-dive into the distributed DHCP and Neutron metadata optimization of the OpFlex agent, i.e. how the OpenStack instances get their IP addresses and metadata with the integration plugin.

(1/3) A deep-dive into OpenStack networking with Cisco ACI Opflex integration – Integration overview

Posted on May 4, 2020September 7, 2020 by GP

This is the follow-up of my previous post on the installation of the ACI Openstack integration plugin (OpFlex mode) in my lab. In this blog post, we will take a step back and discuss why we would want to integrate ACI with OpenStack in the first place, the benefits of the integration (especially OpFlex mode), the different integration modes (ML2 vs. GBP, OpFlex vs. non OpFlex) and the decision to choose one.

You may also find very good details on this topic covered in Cisco ACI Unified Plug-in for OpenStack Architectural Overview document. I am not trying to make a full clone of the whitepaper here, but will summarize some key points and provide demonstrations specific for our previous lab setup with some packet capture to illustrate the networking features that we have discussed.

Tutorial: Provision and consume bare metals with MAAS and Juju – Part 1

Posted on January 31, 2020February 10, 2020 by GP

In this multi-part tutorial series, I will demonstrate how MAAS and Juju have helped me quickly setup and consume both bare metal servers and virtual machines in our lab in an automated, cloud-like fashion.

The first part will cover the high level introduction to MAAS and Juju, my MAAS installation, and MAAS network service configuration.

Part 2 is here.