“ I have setup a cluster with NSX and vSAN for a project. The environment consists of a single environment Edge Gateway, connected to a DLR which is then connected to a group of smaller Edge Gateways for classroom ‘pods’”
During my testing I have noticed that if the environment sits idle, I cannot ping the downstream interface on the environment Edge Gateway from a workstation in a pod. After 5 min. of performing an extended ping, things seem to ‘come up’ and the traffic gets through and out to the internet. This behavior has been tested and occurs on multiple Windows 7 machines behind different small Edges. I can ping from pod to pod and I can ping the DLR north and south interface but cannot ping beyond that.”
“Any advice would be appreciated including where to start looking and what logs might be useful.”
Please review the NSX Troubleshooting Guide - Troubleshooting NSX Edge and see if this sheds more light on the isssue. https://docs.vmware.com/en/VMware-NSX-for-vSphere/6.3/com.vmware.nsx.troubleshooting.doc/GUID-E6CD6FAA-3DA7-4AD7-9577-EE121AA7E1E6.html.