Over the past few weeks, Wissam Mahmassani, Abhinav Mishra, and I have created a few walkthrough videos on setting up Cross-VDC networking inside of vCloud Director 9.5.
Unfamiliar with Cross-VDC networking in vCD? Check out this series of blog posts that review the capabilities and design considerations:
Intro and Use Cases
Getting Started with Cross-VDC
High-Level Provider Design
Design Considerations and Conclusion
The intent of these videos is to discuss setting up Cross-VDC networking in vCloud Director but also have a live chat on items we’ve learned along the way with working with it. Quite frankly, it was an open discussion between the team on the inner workings on vCD/NSX and what our development team has done in the backend.
vCloud Director 9.5 Cross-VDC Networking Video Walkthrough
In the first video, we discuss the pre-requisites before we can start configuring vCloud Director for Cross-VDC networking. In essence, the assumption is cross-vCenter NSX has already been established and we have the primary and secondary NSX managers registered.
Next, we review the concept of creating a Datacenter group and what are the different egress options. This is very important as it explicitly controls how traffic exits the overlay environment.
Here, we discuss how BGP weights control our active/passive egress points and what vCD automates in the backend. The key is this is all done without provider/tenant configuration – vCD automates this process.
As a final wrap-up of the BGP weights, we review creation of the stretched networks inside of vCloud Director along with operational management inside of the vCD H5 UI.
Last of all, we demonstrate testing of Cross-VDC and failover of my “Daniel-App” between the two sites. What’s interesting is the ability to migrate egress points without any loss of connectivity. Unintended failover is managed by BGP weights, which the default timer is 60 seconds and could be revised if required.
As stated before, this shows the requirement of having a mirror Edge configuration, especially for NAT configuration and failover testing between sites.
This was a fun experience with the team while reviewing and having open discussions on Cross-VDC networking. We are hoping these are valuable for those of you that are interested in bringing this as a new service inside of vCloud Director.
Originally posted on https://www.paluszek.com/wp/2019/01/11/cross-vdc-networking/