PDF(162.7 KB) View with Adobe Reader on a variety of devices
ePub(224.4 KB) View in various apps on iPhone, iPad, Android, Sony Reader, or Windows Phone
Mobi (Kindle)(133.6 KB) View on Kindle device or Kindle app on multiple devices
Updated:July 18, 2022
The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
This document describes how to configure network tune settings for Secure Web Appliance (WSA) to improve the upload and download speed of file (s).
Cisco recommends that you have knowledge of these topics:
Secure Shell (SSH) client
Transmission Control Protocol (TCP) window scale
This document is not restricted to specific software and hardware versions.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.
The WSA is designed to handle thousands of client and server connections in parallel.
The default size of the send and receive buffers are configured to deliver optimal performance, and the maximum number of short-lived connections.
Default size for send and receive buffers can introduce upload or download speed degradation. Especially for an environment where large file downloads or uploads contribute to large amount of the daily traffic.
The Network settings of the WSA control send and receive buffer size. Which improves the upload and download speed for large files.
Calculate WSA Maximum Send and Receive Buffer Size
This section explains how to calculate the right WSA network settings to be used in the configuration section.
The formula used to calculate the right network values:
MBUF_CLUSTER_COUNT = 98304*(X/Y)
MBUF_CLUSTER_COUNT: The maximum amount of memory buffer clusters can be used for this WSA.