GajShield supports load balancing your internet traffic across two (or more) ISP links. There is no software limit on the number of ISP links — you are limited only by the number of physical WAN interfaces available on yourGajShield appliance. Load balancing distributes outbound sessions across your ISP links so you get the combined bandwidth of both connections, and it lets traffic keep flowing on the surviving link if one ISP goes down.

What you need before you start 

  • Two (or more) WAN interfaces, each connected to a separate ISP.
  • A working IP configuration for each link (static IP / gateway from the ISP, or PPPoE / DHCP as applicable). 
  • Administrator access to the GajShield web console. 

Failover behaviour

With link health monitoring enabled, the appliance probes each gateway and stops sending new sessions over a link that fails the health check. When the failed ISP recovers, it is brought back into the balancing pool automatically.

Forcing specific traffic over a chosen ISP

If certain traffic must always use one ISP — for example, a service whitelisted by a particular public IP, or VoIP that should ride a low-latency link — create a policy-based / source-based route that pins that traffic to a specific gateway. This route takes precedence over the load-balancing pool for the matching traffic.