Example: Balancing traffic between Internet connections
This scenario shows an example of using Multi-Link to balance the load of traffic between two smaller Internet connections instead of one larger connection.
The administrator at Company B determines that a 4 megabyte Internet connection is required to handle the volume of traffic their network receives. However, Company B is a small company on a tight budget, and the cost of a single 4 megabyte connection is too high. The administrator decides to subscribe to one 2 megabyte connection each from ISP A and ISP B, and use Multi-Link to balance the load of traffic between the two connections to reduce costs.
The administrator:
- Creates NetLink elements to represent connections to ISP A and ISP B.
- Places the ISP A and ISP B NetLinks under the correct interfaces in the Routing tree.
- Creates an Outbound Multi-Link element and adds the ISP A and ISP B NetLinks to it.
- Defines the following NAT rule in the Engine Policy so that traffic from the internal network to destinations that are not internal is balanced by the Outbound Multi-Link element (My
Multi-Link):
Source Destination Service NAT Internal Network element Not Internal expression ANY Dynamic load balancing: My Multi-Link