HP StorageWorks Enterprise File Services WAN Accelerator - Manual (Page 61)

HP S TORAGE W ORKS EFS WAN A CCELERATOR M ANAGEMENT C ONSOLE U SER G UIDE 61
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‹ “Setting Quality of Service Rules” on page 71
‹ “Setting Service Ports” on page 72
‹ “Enabling WCCP Groups” on page 74
Setting
Connection
Forwarding
Optionally, you can enable connection forwarding for asymmetric networks in the
Setup: Advanced Networking - Connection Forwarding page. In asymmetric
networks, a client request traverses a different network path than the server response.
Although the packets traverse different paths, for the HP EFS WAN Accelerator to
optimize the connection, 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.
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 must specify the HP EFS WAN Accelerator
in-path IP address, not the primary IP address.
NOTE: If there are more than two possible paths, additional HP EFS WAN Accelerators must
to 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 deployments, see the HP
StorageWorks Enterprise File Services WAN Accelerator Deployment Guide.