Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Although settings are configured at a given level, they are always configured for 
a specific mode. It is not necessary to configure settings for all modes within a 
level. The cluster mode is a special case. Because there can only be one cluster, 
all settings configured for the cluster mode can be said to be configured at the 
cluster level.

You should normally configure most settings at the cluster level. However, 
settings that have been specifically configured at lower levels will override 
settings configured at higher levels. Thus, you can override cluster-mode settings 
with group-mode or machine-mode settings.

For example, you might start by configuring the Good Neighbor Table in cluster 
mode; all machines in the cluster would use that configuration. Then, you might 
also configure this table in machine mode for machine 

newyork

. In this case, all 

other machines in the cluster will still use the good neighbor table defined at the 
cluster level, but the machine 

newyork

 will override the cluster settings with its 

individual machine mode settings.

The ability to override cluster settings for specific groups or machines gives you 
a lot of flexibility. However, if you find yourself configuring many settings 
individually in machine mode, you will lose much of the ease of administration 
that clusters were intended to provide.

For most features, when you begin to configure settings for a new mode, those 
settings will initially be empty by default. There is a distinction between empty 
settings and having no settings in a mode. As an example, consider a very simple 
cluster composed of one group and one machine. Imagine that you have an LDAP 
query configured at the cluster level. There are no settings configured at the group 
or machine levels:

Cluster

(ldap queries: a, b, c)

Group

Machine