When you have VMs that are connected to the NSX-T Data Center overlay, you can configure a bridge-backed logical switch to provide layer 2 connectivity with other devices or VMs that are outside of your NSX-T Data Center deployment.

For an example topology, see Figure 1.


  • Verify that you have a bridge cluster or a bridge profile.
  • At least one ESXi or KVM host to serve as a regular transport node. This node has hosted VMs that require connectivity with devices outside of a NSX-T Data Center deployment.
  • A VM or another end device outside of the NSX-T Data Center deployment. This end device must be attached to a VLAN port matching the VLAN ID of the bridge-backed logical switch.
  • One logical switch in an overlay transport zone to serve as the bridge-backed logical switch.


  1. From a browser, log in to an NSX Manager at https://<nsx-mgr>.
  2. Select Networking > Switching from the navigation panel.
  3. Click the name of an overlay switch (traffic type: overlay).
  4. Click Related > ESXi Bridge Clusters or Related > Edge Bridge Profiles.
  5. Click Attach.
  6. To attach to a bridge cluster,
    1. Select a bridge cluster.
    2. Enter a VLAN ID.
    3. Enable or disable HA on VLAN.
    4. Click Attach.
  7. To attach to a bridge profile,
    1. Select a bridge profile.
    2. Select a transport zone.
    3. Enter a VLAN ID.
    4. Click Save.
  8. Connect VMs to the logical switch if they are not already connected.
    The VMs must be on transport nodes in the same transport zone as the bridge cluster or bridge profile.


You can test the functionality of the bridge by sending a ping from the NSX-T Data Center-internal VM to a node that is external to NSX-T Data Center. For example, in Figure 1, app VM on the NSX-T Data Center transport node should be able to ping DB VM on the external node, and the reverse.

You can monitor traffic on the bridge switch by clicking the Monitor tab.

You can also view the bridge traffic with the GET<endpoint-id>/statistics API call:
  "tx_packets": {
    "total": 134416,
    "dropped": 0,
    "multicast_broadcast": 0
  "rx_bytes": {
    "total": 22164,
    "multicast_broadcast": 0
  "tx_bytes": {
    "total": 8610134,
    "multicast_broadcast": 0
  "rx_packets": {
    "total": 230,
    "dropped": 0,
    "multicast_broadcast": 0
  "last_update_timestamp": 1454979822860,
  "endpoint_id": "ba5ba59d-22f1-4a02-b6a0-18ef0e37ef31"