In directed mode load balancing, all Application Server reside on the same physical network and the load balancer acts as a request forwarder to the load balancer service.
 | Note: All cache instances in the cluster must be available to each cache server. In directed mode, all servers must be on the same physical subnet. |
The following workflow describes directed mode load balancing:
The IMPAX Client initiates a request to the virtual IP address of the IMPAX on the load balancer.
After traversing the network and any intervening routers or firewalls, the request is forwarded to an Application Server from the load balancer.
The Application Server then responds directly to the Client.
The same is true of pixel data that is delivered using ASPFTP.
The Client initiates a request on port 3040 to the virtual IP address of the cache service on the load balancer.
The load balancer forwards the connection open request to the appropriate cache server and any subsequent communication is direct to the Client from the cache server.