Citrix Systems CITRIX NETSCALER 9.3 Parameters for setting the TCP buffer size in a TCP profile

Chapter 5 Advanced Configurations

Parameters for setting the TCP buffer size in a TCP profile

name

Name of the TCP profile. Maximum length: 127 characters.

bufferSize

TCP buffer size in bytes. Maximum value: 4194304. Minimum value: 8190. Default: 8190.

To set the TCP buffer size in a TCP profile by using the NetScaler configuration utility

1.In the navigation pane, expand System, and then click Profiles.

2.In the details pane, click the TCP Profiles tab, and then do one of the following:

•To create a custom, entity-level TCP profile, click Add and, in the Create TCP Profile dialog box, type a name for the new profile.

•To set the TCP buffer size for an existing TCP profile, click the name of the TCP profile, and then click Open. If you want to set the TCP buffer size in the global TCP profile, click nstcp_default_profile.

3.In the Create TCP Profile or Configure TCP Profile dialog box, in the TCP Buffer Size (Bytes) box, type the number of bytes to specify as the minimum TCP buffer size.

4.Click Create or OK.

Optimizing the TCP Maximum Segment Size for a Virtual Server Configuration

You can specify the Maximum Segment Size (MSS) that the Citrix® NetScaler® appliance advertises to a client when the client initiates a connection to a virtual server on the appliance. You can configure the MSS for the virtual servers configured on the appliance in two ways:

wYou can set the MSS for each virtual server to a value of your choice in a TCP profile.

wYou can set the learnVsvrMSS global TCP parameter to ENABLED to enable MSS learning for all the virtual servers configured on the appliance.

If you know the optimal MSS value for a given virtual server, you can specify the MSS in a TCP profile and bind the profile to the virtual server. When a client initiates a connection with the virtual server, the NetScaler appliance advertises the specified MSS value to the client. However, if the appliance is also configured to learn the optimum MSS value from bound services (as described in the following section), the learned MSS value takes precedence, and the value specified in the TCP profile is used only until

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