Web Isolation: Latency and Bandwidth

Products

• Web Isolation

Issue/Introduction

This article is intended for users of SymDiag. Though general readers may benefit from the article’s contents, any solutions, insights, or guidance are geared toward those using SymDiag.

Problem

The end user experiences slower system response, long waits for file downloads (and uploads), and longer rendering times.

Cause

The Web Isolation platform renders web sites on the server. Only a visual feed is sent to the end user’s browser. Therefore, bandwidth and latency have a large impact on the user’s experience. The greater the bandwidth, the more data the Web Isolation instance can send at a given time. This results in quicker downloads and uploads. Likewise, a smaller latency value improves the responsiveness between the user’s mouse and keyboard gestures and the rendered website.

Resolution

Make sure the endpoint’s bandwidth and latency thresholds adhere to the parameter settings listed in the tables below. The following table contains bandwidth thresholds.

Bandwidth Thresholds

Threshold	Diagnostic Result
Above 20 Mbps	OK
Between 5–20 Mbps	Warning: degraded performance can be expected
Below 5 Mbps	Error

The following table contains latency thresholds.

Latency Thresholds

Threshold	Diagnostic Result
Below 70 ms	OK
Between 70–200 ms	Warning: degraded performance can be expected
Above 200 ms	Error

For further information, see the Symantec Threat Isolation Platform (STIP) Guide for Administrators section on Installing the Symantec Threat Isolation Platform > Troubleshooting > Slowness Issues.