Overview

In ExOS7.x, enabling Edge Cache may cause traffic to move back and forth between two policies; this will happen when the traffic using TCP port 80 is controlled by a policy different than the policy on which Edge Cache is enabled (for Web or HTTP traffic). 

For example, Windows Updates are downloaded over TCP port 80.  By default, these updates are managed by the Software Updates policy. If Edge Cache is enabled on a policy that contains either the Web or HTTP application, Windows Updates will appear to bounce back and forth between the Software Updates and Web policies on the real-time monitor. It may show up as Web, and when the page refreshes, it switches to Software Updates.

Root Cause

A known software defect in ExOS7.x causes this behavior.

Resolution

As a workaround, you may turn off Edge Cache to prevent the traffic from moving between policies in the real-time monitor. Be aware that this defect is considered harmless, and should not be impacting the traffic negatively. 

Additionally, this defect has been resolved in ExOS7.4.3. Upgrading the firmware to version ExOS7.4.3 will stop the traffic from moving between policies.