If you have 3300 ICPs in your system that require resiliency, you can create multiple zone access points between the two zones so the bandwidth limit leaving the zone can be shared between different 3300 ICPs. The following diagram illustrates this configuration:
Bandwidth For Resiliency
In this situation, the total bandwidth leaving Zone 4 can be split between ICP 1 and ICP 2 in appropriate portions, and each system will manage its own bandwidth across the zone access point. When ICP 1 is taken off-line, the sets previously registered with ICP 1 will register with ICP 2 as their secondary controller. Any calls from these sets across the network to Zone 2 will have the bandwidth controlled; that is, CAC counted by ICP 2.
During the time ICP 1 is off line, the Network Administrator may want to increase the bandwidth limit across the Zone Access Point managed by ICP 2 due to the fact that the Zone Access Point local to ICP 1 will not be utilized.
Refer to Implementing Load Balancing for information for multi-zone access point programming information.
