In previous posts of the series, I have covered the installation of the Cisco ACI Opflex plugin our OpenStack lab and covered the basics of the plugin. Specifically, we have gone through the core benefits of the Opflex OVS agent, such as virtualization visibility on ACI, distributed routing, optimized DHCP and Metadata functions, etc.
In this part 3 of the series, I will cover the setup of the external networks to allow OpenStack instances in the created tenants to communicate with the outside world through ACI.
Continue reading “(3/3) A deep-dive into OpenStack networking with Cisco ACI Opflex integration – External connectivity”
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.
Continue reading “(2/3) A deep-dive into OpenStack networking with Cisco ACI Opflex integration – Neutron DHCP/Metadata optimizations”