HP StorageWorks Enterprise File Services WAN Accelerator 2.1 Command Line Interface Reference Guide (November 2005)

HP STORAGEWORKS EFS WAN ACCELERATOR COMMAND-LINE INTERFACE REFERENCE MANUAL 145

4 - CONFIGURATION-MODE

OMMANDS

For someone with an Optical Carrier-3 line or faster, turning off SDR makes sense and

allows HSTCP reach its full potential. For a 2 Mbps link regardless of the amount of

latency, it is better to keep SDR enabled, because the HSTCP mechanism is typically

not triggered until you reach beyond 100 Mbps of WAN throughput.

NOTE: If you want to delete the license for HSTCP, you must first disable the feature.

Syntax tcp highspeed enable

Parameters None

Usage To configure HSTCP you must:

 have a valid license for HSTCP.

 enable HSTCP.

 if your WAN link capacity is 100 Mbps, disable the Lempel-Ziv (LZ)

compression and Scalable Data Referencing (SDR) in the optimization policies.

For detailed information, see “in-path rule auto-discover” on page 89.

 enable in-path support. For detailed information, see “in-path enable” on page 83.

 increase the WAN buffers to 2 Bandwidth Delay Product (BDP) or 10 MB. You

can calculate the BDP WAN buffer size. For a link of 155 Mbps and 100 ms

round-trip delay, the WAN buffers should be set to:

2 * 155 Mbps * 100 ms = 1937500 bytes

 increase the LAN buffers to 1 MB.

For example:

minna (config) # tcp highspeed enable

minna (config) # in-path rule auto-discover srcaddr 0.0.0.0/0 dstaddr

0.0.0.0/0 dstport 0 optimization none vlan -1 neural-mode always rulenum

minna (config) # in-path enable

minna (config) # protocol connection lan receive buf-size 1000000

minna (config) # protocol connection lan send buf-size 1000000

minna (config) # protocol connection wan receive def-buf-size 3875000

minna (config) # protocol connection wan send def-buf-size 3875000

Example minna (config) # tcp highspeed enable

minna (config) #

terminal

Description Configures the terminal display settings. The no command option disables the

terminal settings.

Syntax terminal {type <type> | length <number>| width <number>}