We may face an scenario in which an edge goes down as soon as it is activated, a common cause for this is when NAT direct is disabled on the WAN interface, these are some reasons why an edge goes down when NAT direct is disabled:
- Edge is unable to form tunnels with the VeloCloud gateway, and the direct communication via WAN interface fails. The source IP of the packets sent to the VCO is the management IP of the edge, then if NAT Direct is not enabled in the WAN ports we may experience reachability problems
- If a static default route is being advertised by any of the VCEs then management traffic (to VCO) from all other edges will breakout direct.
VMware SD-WAN by VeloCloud
Enable Nat direct in VCO, and re-activate the edge.
If you are unable to re-activate the edge, and need to enable NAT direct from CLI as a temporary workaround, please contact VeloCloud support team.