HP StorageWorks Enterprise File Services WAN Accelerator - Manual (Page 68)

68 C ONFIGURING THE HP EFS WAN A CCELERATOR
4. Click Save to save your settings permanently or click Reset to return the settings
to their previous values.
Enabling
Connection
Forwarding 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.