Example: Balancing traffic according to link capacity
To manage ISP connections having very different bandwidths, you configure an Outbound Multi-Link element and select ratio load balancing.
Company B has three ISP connections that have different bandwidths:
- ISP A 20 Mbit/s
- ISP B 10 Mbit/s
- ISP C 4 Mbit/s
The administrators want the traffic to be divided between the NetLinks according to the ratio of their relative bandwidths. This means that ISP A handles twice as much traffic as ISP B and five times as much traffic as ISP C. The administrators have already created and configured NetLink elements to represent each ISP connection, so now they:
- Combine the NetLinks for each ISP connection into an Outbound Multi-Link element and select the Ratio load-balancing method.
- Define the following NAT rule for outbound load balancing in the Firewall Policy:
Source Destination Service NAT ANY ANY ANY Dynamic load balancing: Multi-Link Element