How is the CDO Mode work

[RenxiaoChen]

When CDO mode is enabled, a CDO logic switch is created and there is a Global VTEP list. But how the Global VTEP list works, and why the existence of this Global VTEP list, VMs on the host can communicate, do not understand.

AND What does the BUM traffic of the following figure mean?

Can you explain it to me?

[smitmartijn]

All the information you need is laid out in the blog post of Humair here: NSX-V 6.3: Control Plane Resiliency with CDO Mode - Network Virtualization - Additional information can be found in the documentation here: Controller Disconnected Operation (CDO) Mode

If you have a targeted question, you might get a better answer - otherwise, I'd suggest to get in a room with an expert and do a whiteboard session. 😉

Also, BUM stands for Broadcast, Unknown Unicast and Multicast. Anything that doesn't have a proper destination.

[bayupw]

I would suggest you to watch the VMworld session on CDO here on 28:47: VMworld 2017 - NET1775BU - Advanced VMware NSX: Demystifying the VTEP, MAC, and ARP Tables - YouTube

I think the session would help you understand more about CDO in details and potentially answers your questions

[RenxiaoChen]

I have seen the  links you pushed before asking this question. TKS.

Maybe I didn't describe my problem clearly.

The questions are as follows:

1. After the CDO mode is enabled, a CDO logic switch can be created and a Global vtep list will be created.I know this knowledge.

2. When the host and controller are disconnected, the VMs on the esxi host  can also continue to communicate.How does the Global vtep list work here?

Thank you for your answer.@