We have 2 WAN/Internet links but our firewall only supports one default gateway. How does the Elfiq Link Balancer manage traffic?
Since the Link Balancer operates at the data link layer of the OSI model (layer 2), it is practically invisible to the network. It detects, caches and manages the MAC addresses of the different WAN routers. Since the firewall only supports one default gateway, the Link Balancer will route the appropriate packets to the chosen router. The Link Balancer registers all the MAC addresses of the external routers and stores each of them under a GMAC. If one of the routers fails to answer ARP requests, the balancer will automatically answer them for it and redirect the packets to one of the available GMACs, as chosen in the configuration. Therefore, everything is transparent to the firewall.
