This document helps you select the appropriate network backend for your gateway cluster. Configuration assumes nodes run the OpsRamp OS image. Customer-provided nodes may have additional firewall and port requirements.
Selecting a Network Backend
Choose your network backend based on your network topology and port availability:
| Network Setup | UDP Port 8472 Allowed | Recommended Backend |
|---|---|---|
| Routed (through router) | Yes | vxlan |
| Switched (local network) | Yes | vxlan |
| Switched (local network) | No | host-gw |
VXLAN Backend
Use vxlan if UDP port 8472 is open between all nodes. This is the default and recommended option for most deployments.
Host Gateway Backend
Use host-gw only if UDP port 8472 is blocked between nodes. This backend requires:
- All nodes to be directly reachable without intermediate routers
- ARP traffic to be allowed across all network switches
Next Steps
If you are unsure whether UDP port 8472 is permitted in your environment, contact your network administrator for clarification.