How is ECMP metered when configured in the Provider architecture within the VMware Cloud Provider Program?

Recently, I received a request from one of our aggregators regarding how Equal Cost Multipathing (ECMP) is metered within the VMware Cloud Provider Program (VCPP), specifically Tom Fojta’s recommendation on architecting Provider-managed NSX Edges and Distributed Logical Router (DLR) in ECMP mode, specifically this diagram from the Architecting a VMware vCloud Director Solution – 

As shown in the diagram above – How does Usage Meter handle bill these tenant virtual machines (VMs) when we have a provider NSX architecture that utilizes ECMP? 

For you TL;DR readers – any VM connected to a Tenant Edge / direct network that has ECMP enabled northbound, NSX Advanced will be charged for said VM. Read on if you want to learn how this is done. 

First off, let’s talk about why this matters. Per the Usage Meter Product Detection whitepaper (this can be found on VMware Partner Central), we can see how Usage Meter detects specific NSX features based on the pattern of usage. Regarding dynamic ECMP, it is metered by the “Edge gateway” which could be a little ambiguous. If one utilizes ECMP, they would be metered for NSX Advanced within VCPP. 

One of the scenarios from the whitepaper does show ECMP-enabled Edges but not an Edge that is abstracted away from the provider environment – 

My initial reaction was that Usage Meter would not look at the northbound provider configuration and the interconnectivity to vCloud Director. However, I was not confident and wanted to verify this explicit configuration and expected metering. Let’s review my findings. 

Lab Setup

In the above diagram, we can see I created a similar Provider managed NSX configuration with ECMP enabled from the DLR to the two Provider Edges with dynamic routing enabled (BGP). From there, I expose a LIF/Logical Switch named “ECMP-External-Network” to vCloud Director that is then exposed to my T2 organization as a new External Network.

From there, I created a dedicated Tenant Edge named “T2-ECMP-ESG” that will be attached to this newly created network along with a VM named “T2-ECMP-VM.” The goal is to verify how T2-ECMP-VM and T2-TestVM are metered by Usage Meter with this newly created Tenant Edge. 

Lab Configuration

My Edges are setup for BGP and reporting the correct routes from the southbound connected DLR (and tenant Edges) – 

From the DLR, we can see that I have two active paths to my Provider Edges (Provider-Edge-1 and 2) – 

Last of all, my T2-ECMP-ESG is operational and attached to the newly created ECMP External Network – 

Last of all, I have my VM’s created and powered on (remember, Usage Meter will only meter powered on VM’s). We can see T2-ECMP-VM is attached to a org routed network from T2-ECMP-ESG named “T2-ECMP-Network” – 

Findings

Let’s work from the north to south – start with the Provider Edges and show how Usage Meter detects and bills. 

Note – I have vROps Enterprise in my lab environment, so we will see Usage Meter picking up vROps registration and placing it in the appropriate bundle.

Provider Edges / DLR

As expected, the Provider Edges and DLR are detected along with registration to vROps. By design, NSX Edges are charged for the Advanced SP Bundle as they are metered as a management component (minimum Advanced bundle / 7-point). However, in my case, we see detection, and then registration to vROps Enterprise. Therefore, since it’s a bundle ID (BND) of 12, this is correlated to Advanced Bundle with Management (10-point) – 


Tenant Edge – T2-ECMP-ESG

Just like the Provider Edges and DLR, we see T2-ECMP-ESG register to UM along with vROps Enterprise registration. Same billing model as above. 

Tenant VM – T2-TestVM

I would not expect any change to this VM, but wanted to showcase that having a separate Edge with standard networking (i.e. no ECMP) will bill based off the NSX SP Base level. As expected, T2-TestVM was handled by Usage Meter just as anticipated – we can see registration, NSX SP Base usage, along with registration to vROps Enterprise – 

Tenant VM – T2-ECMP-VM

Finally, let’s take a look at my T2-ECMP-VM – as discussed before, this is wired to a Tenant Edge that is connected to the ECMP-enabled DLR via an External Network. 

We see initial registration, registration to vROps Enterprise, then NSX Advanced usage! This would be metered at Advanced Bundle with Networking and Management due to the NSX Advanced usage (12-point). 

Summary of Findings

Here’s what we learned:

  1. Edges/DLR Control VM’s are not charged for NSX usage since UM handles them as a management component. If you are using vROps, it will place it in the most cost effective bundle.
  2. Utilizing ECMP at the provider-level DOES impact any southbound connected VM from a billing perspective, even if an Edge sits in between the ECMP enabled configuration and the tenant VM. Per the findings, NSX Advanced will be metered. 
  3. Therefore, be aware of any NSX provider architecture and the use of NSX specific features. 

Again, this shows the logic inside of Usage Meter and how it relates to metering for tenant workloads. Cheers!

-Daniel

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