In technical, we will use firewall mangle to mark the packets for further processing (we use mark-routing).Because NAT is applied, we gonna use connection-mark with source-ip-address as classifier. This means each IP address on LAN will be mapped into existing outgoing connections.RouterOS supports load balancing algorithm that could work on connection-mark (example: PCC – per connection classifier) or packet-mark (example: nth). Datarate of ISP1 is 5 mbps, and ISP2 is 5mbps.We expect the consumed bandwidth from both ISP are similar, so we will spread the traffic load among connections. Computers on LAN will access internet through ISP1 or ISP2.Topology of the network can be seen at the picture above. End-devices (laptop, PC, etc) will use private IP address, where router will do NAT (Network Address Translation) on these private IP when they are going out to internet. This project is challenging because both ISP gives Public IP address which is just enough for point-to-point connection only. This case is different from the previous one that was using BGP protocol and whole end devices are using public IP address. In this project (click here for the detail), our client requests to combining 2 ISP with one mikrotik.
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