4. Networking Examples : 4.5 VXLAN ORG Network for Disaster Recovery : 4.5.3 VXLAN Example Testing Summary : 4.5.3.2. Test 2 – Disable vCloud Networking and Security Edge Gateway vNICs
   
4.5.3.2. Test 2 – Disable vCloud Networking and Security Edge Gateway vNICs
The purpose of this test is to investigate alternative methods to make sure that network traffic is routed over a specific interface on an Edge Gateway. The approach validates that disconnecting a virtual adapter has the effect of taking the interface down. This prevents network traffic from being passed to the incorrect interface. The following is the high level test procedure.
To verify lack of network connectivity
1. Attempt to connect to vCenter Server, navigate the inventory and edit the Connected status of the virtual machine settings. In vCenter Server the option to edit the configuration of the vCloud Networking and Security Edge (Edge) appliance is disabled.
2. Repeat Step 1, but from the ESXi host on which the Edge device is running. In ESXi the option to edit the configuration of the Edge appliance is enabled
3. Repeat the network connectivity steps defined in Test 1, Step 4 – Despite disabling the network adapter the Edge device appears to continue to try to route packets over the original interface.
Although the ability to update the Edge device settings is disabled within vCenter Server, it is still accessible by connecting directly to the ESXi host on which the appliance is running. The key observation during this testing is that despite disabling the virtual adapter for the Edge appliance, the guest OS of the Edge device does not correctly detecting that the interface was down. The hardware change is detected as “protocol down, device up.”