About Multi-IWSVA Configurations

You can install multiple instances of IWSVA on a LAN to accommodate high HTTP bandwidth demands:

• Set up multiple IWSVA ICAP servers to work with a single ICAP client (load balancing)

• Set up multiple transparency mode servers to use a Layer 4 (L4) switch for load balancing and fail over

• Set up multiple HTTP stand-alone servers to use WCCP for load balancing and fail over

• Set up multiple IWSVA servers in High Availability mode where the parent member configuration is automatically synchronized to the child member.

In most cases, one IWSVA server must be designated as the ”parent”, and the configuration files must be synchronized through the CCR, manually or by Schedule. However, for HA mode, the active node and passive node synchronize configurations automatically.

• Note: When running multiple instances of IWSVA together, it is very important that your pattern files, URL blocking policies, and system clocks on each server match, and then remain in synch.
  
  Trend Micro recommends that if you will be using multiple instances of IWSVA, that you do so using Trend Micro Control Manager.