Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Cisco offers the following resources to learn more about your appliance. 

You can access the online help version of this user guide directly from the appliance GUI by clicking 
Help and Support in the upper-right corner. 

Documentation for this appliance is available from 

. 

The documentation set for the Cisco Email Security appliances includes the following documents and 
books: 

Release Notes 

The Quick Start Guide for Email Security appliances

Cisco AsyncOS for Email User Guide (this book)

More information about training is available from: 

 

Feature key is no 
longer required 
to enable 
Centralized 
Management 
feature

By default, Centralized Management feature is enabled in your appliance. A feature 
key is no longer required to enable this feature. 

Revised 
threshold levels 
for entering 
resource 
conservation 
mode.

Prior to this release, Email Security appliance enters resource conservation mode 
when the RAM utilization exceeds 75% and the allowed injection rate is gradually 
decreased as RAM utilization approaches 85%. 

From this release onwards, these threshold values are revised as AsyncOS for Email 
is now a 64-bit software. Appliance enters resource conservation mode when the 
RAM utilization exceeds 45% and the allowed injection rate is gradually decreased 
as RAM utilization approaches 60%. This change does not affect the memory 
utilization on the appliance and all the components in the appliance continue to use 
the memory as earlier.