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Barracuda Load Balancer ADC

Why can't my real servers communicate with my back-end database servers when I have my Barracuda Load Balancer configured in route-path mode?

  • Type: Knowledgebase
  • Date changed: 3 years ago
Solution #00003315

All Barracuda Load Balancers configured in route-path mode, all firmware versions.

In a proper route-path deployment, real servers cannot have a second NIC card enabled if that NIC card is on another subnet (unless that subnet is also private). If the real servers can find a route around the Load Balancer, route path will not work and you will eventually experience packet loss. This can be mitigated with static routes configured on each of the real servers, but if outgoing or return traffic finds a way around the Load Balancer, it will not work. The real servers must be fully logically isolated in route-path mode.

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