NSX-T Edge TEP networking options

Products

• VMware NSX
• VMware NSX-T Data Center

Issue/Introduction

This article explains the environmental configurations that determine if the NSX-T Edge TEP and the ESXi TEP can be on the same network.

Note: Invalid configuration may result in BFD tunnels going down between Edges and Hosts while Host to Host and Edge to Edges remain up. Alarm - "Edge tunnels down" . 

Environment

VMware NSX-T Data Center
VMware NSX

Resolution

Edge TEP and ESXi host TEP can be configured on the same VLAN in the following configurations:

 - Edge VM TEP interface connected to a vDS portgroup on an ESXi host not prepared for NSX
 - Edge VM TEP interface connected to a vDS portgroup on a switch not used by NSX, on an ESXi host prepared for NSX
 - Edge VM TEP interface connected to a logical switch/segment on a vDS7 with NSX-T 3.1.0 or above and is on a host prepared for NSX
 - Edge VM TEP interface connected to a logical switch/segment on a NVDS with NSX-T 3.1.0 or above and is on a host prepared for NSX


Edge TEP and ESXi host TEP must be on separate VLANs in the following configurations:

 - Edge VM TEP interface connected to a vDS portgroup where that vDS is used by NSX-T
 - Edge VM TEP interface connected to a logical switch/segment on vDS/NVDS prior to NSX-T 3.1.0