HP Enterprise File Services WAN Accelerator Enabling Connection Forwarding, Asymmetric Network

Enabling

Connection

Forwarding

4.Click Save to save your settings permanently or click Reset to return the settings to their previous values.

You enable connection forwarding in a network configuration with multiple paths from the server in the Advanced Networking - Connection Forwarding page.

You enable connection forwarding only in asymmetric networks; that is, in networks in which a client request traverses a different network path than the server response.The default port for connection forwarding is 7850.

To optimize connections in asymmetric networks, packets traveling in both directions must pass through the same client-side and server-side HP EFS WAN Accelerator. If you have one path from the client to the server and a different path from the server to the client, you need to enable in-path connection forwarding and configure the HP EFS WAN Accelerators communicate with each other. These HP EFS WAN Accelerators are called neighbors and exchange connection information to redirect packets to each other.

Figure 2-25.Asymmetric Network

Neighbors can be placed in the same physical site or in different sites but the latency between them should be small because the packets travelling between them are not optimized.

IMPORTANT: When you define a neighbor, you specify the HP EFS WAN Accelerator in-path IP address, not the primary IP address.

If there are more than two possible paths, additional HP EFS WAN Accelerators must be installed on each path and configured as neighbors. Neighbors are notified in parallel so that the delay introduced at connection set up is equal to the time it takes to get an acknowledgement from the furthest neighbor.

For detailed information about connection forwarding, see the HP StorageWorks Enterprise File Services WAN Accelerator Deployment Guide.

68 CONFIGURING THE HP EFS WAN ACCELERATOR