Citrix Systems CITRIX NETSCALER 9.3 manual Parameters for configuring window scaling, WSVal

Citrix NetScaler Administration Guide

wYou do not configure window scaling unless you clearly know why you want to change the window size.

wBoth hosts in the TCP connection send a window scale option during connection establishment. If only one side of a connection sets this option, windows scaling is not used for the connection.

wEach connection for same session is an independent Window Scaling session. For example, when a client's request and the server's response flow through the NetScaler appliance, it is possible to have window scaling between the client and the appliance without window scaling between the appliance and the server.

By default, window scaling is not enabled.

To configure window scaling by using the NetScaler command line

At the NetScaler command prompt, type the following command to configure window scaling and verify the configuration:

wset ns tcpParam [-WS ( ENABLED DISABLED )] [-WSVal <positive_integer>]

wshow ns tcpParam

Example

>set ns tcpParam -WS ENABLED -WSVal 6 Done

>sh ns tcpParam

TCP Parameters
Window	Scaling status	: ENABLED
Window	Scaling factor	: 6
SACK status		:

ENABLED

.

.

.

TCP minimum RTO in millisec: 1000

TCP Slow start increment: 2

Done

Parameters for configuring window scaling

WSVal

Factor used to calculate new window size. Possible values: 0 to 8. Default: 4.

WS

Enables or disables window scaling.

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