HP Enterprise File Services WAN Accelerator manual 3. Cascade Deployment

Cascade Deployment

Cascade configurations enable multi-site deployments where the server end-points are located at intermediate sites and connections between the client and the server might pass through intermediate HP EFS WAN Accelerators to reach their final destination. HP EFS WAN Accelerators direct client-side HP EFS WAN Accelerator auto- discovery packets to the correct HP EFS WAN Accelerator end-point.

Figure 10-3.Cascade Deployment

When the Client connects to a server in Site B, HP EFS WAN Accelerator1 and HP EFS WAN Accelerator2 are optimizing the connection. When the Client connects to a server in Site C, HP EFS WAN Accelerator1 and HP EFS WAN Accelerator3 are optimizing the connection.

The following rules apply to cascade deployments:

‹A cascade deployment can be created on either the client side or on the server side.

‹In a cascade deployment, only pass-through peering rules are used.

Peering Rules Peering rules define what to do when an HP EFS WAN Accelerator receives an auto- discovery probe from another HP EFS WAN Accelerator.

In Figure 10-3, Server1 is on the same LAN as HP EFS WAN Accelerator2 so connections from the client to Server1 should be optimized between HP EFS WAN Accelerator1 and HP EFS WAN Accelerator2. Concurrently, Server2 is on the same LAN as HP EFS WAN Accelerator3 and connections from the client to Server2 should be optimized between HP EFS WAN Accelerator1 and HP EFS WAN Accelerator3.

To configure this example, you do not need any rules on HP EFS WAN Accelerator1 or HP EFS WAN Accelerator3; you need to add peering rules on HP EFS WAN Accelerator2 to process normally connections going to Server1 and to pass all other connections so that connections to Server2 are not optimized by HP EFS WAN Accelerator2. You also need a default rule to pass through inner connections between HP EFS WAN Accelerator1 and HP EFS WAN Accelerator3 (by default connection to destination port 7800).

This example has the following parameters:

‹Server1 IP address is 10.0.2.2 on a /24

HP STORAGEWORKS ENTERPRISE FILE SERVICES WAN ACCELERATOR 2.1.5 DEPLOYMENT GUIDE 111

10 - SERIAL CLUSTER AND CASCADE DEPLOYMENTS