A transport zone is used to define the scope of a VXLAN overlay network and can span one or more clusters within one vCenter Server domain. One or more transport zones can be configured in an NSX for vSphere solution. A transport zone is not meant to delineate a security boundary.

Table 1. Transport Zones Design Decisions

Decision ID

Design Decision

Design Justification

Design Implications


Use a single universal transport zone.

A Universal Transport zone supports extending networks and security policies across regions. This allows seamless migration to the two pod validated design.

You must consider that you can pair up to eight NSX Manager instances. If the solution grows past eight NSX Manager instances, you must deploy a new primary manager and new transport zone.


Enable Controller Disconnected Operation (CDO) mode.

During times when the NSX controllers are unable to communicate with ESXi hosts data plane updates, such as VNI's becoming active on a host, will still occur.

Enabling CDO mode adds some overhead to the hypervisors when the control cluster is down.