HP StorageWorks Enterprise File Services WAN Accelerator 2.1 Installation and Configuration Guide (November 2005)

44 2 - INSTALLING AND CONFIGURING THE HP EFS WAN ACCELERATOR
The IP address must be the Primary Port IP address on the target HP EFS
WAN Accelerator. The default port is 7810.
6. If you have a backup, out-of-path, HP EFS WAN Accelerator in your
system (that is, failover support), type the IP address and port for the
backup appliance in the Backup IP and Port text boxes. Use the following
format: 0.0.0.0/0. The default port is 7810.
7. Click Add Rule to apply the rule to the running configuration.
8. Click Save to write your settings to memory or click Reset to return the
settings to their previous values.
You can check and modify your configuration settings in the Management
Console. For detailed information, see the HP Enterprise File Services WAN
Accelerator Management Console User Guide.
For detailed information about verifying your connections and configuration
settings, see “Verifying Your Connections” on page 37 and “Verifying Your
Configuration” on page 39.
You can now optimize WAN traffic using the HP EFS WAN Accelerator.
SMB Signing and Windows Performance
The Common Internet File System (CIFS) protocol, used by Windows
operating systems for file and print sharing, is based on the Server Message
Block (SMB) protocol. To prevent security assaults that might modify
transmissions, the SMB protocol supports signing all transmitted SMB
packets. By default, Domain Controllers that also act as file servers have
signing enabled.
SMB signing is a performance intensive operation for clients and servers.
Hence this feature is not turned on all the time. This feature is negotiated
between the client and the server.
SMB signing prevents the HP EFS WAN Accelerator from applying full
optimization on CIFS connections and significantly reduces the performance
gain of an HP EFS WAN Accelerator deployment. As many customers take
additional security precautions (such as firewalls, internal-only reachable
servers, and so forth), SMB signing adds little additional security, at a
significant performance cost (even without deployed HP EFS WAN
Accelerators).
NOTE: For detailed information about the performance impact of SMB signing, see the
Microsoft support site. SMB signing was enabled on Windows 2000, Service Pack 3,
Critical fix Q329170.