Cisco Cisco Email Security Appliance C160 Mode D'Emploi

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Cisco AsyncOS 8.5.5 for Email Security User Guide
 
Chapter 38      Centralized Management Using Clusters
  Best Practices and Frequently Asked Questions
Procedures: Configuring an Example Cluster
To configure this example cluster, log out of all GUIs on all machines before running 
clusterconfig
Run 
clusterconfig
 on any one of the primary site machines. You will then join to this cluster only the 
other local and remote machines that need the maximum possible shared settings (allowing for the 
machine only-settings like IP address).  The 
clusterconfig
 command cannot be used to join a remote 
machine to the cluster — you must use the CLI on the remote machine and run 
clusterconfig
 (“join an 
existing cluster”).
In our example above we log in to lab1, run 
clusterconfig
 and create a cluster called CompanyName. 
We have only one machine with identical requirements, so we log in to lab2, and 
saveconfig
 the existing 
configuration (it will be drastically altered when it inherits most of lab1 settings.) On lab2 we can then 
use 
clusterconfig
 to join an existing cluster. Repeat if you have additional machines at this site needing 
similar policies and settings.
Run CONNSTATUS to confirm that DNS resolves correctly. As machines are joined to the cluster, the 
new machines inherit almost all of their settings from lab1 and their older settings are lost. If they are 
production machines you will need to anticipate if mail will still be processed using the new 
configuration instead of their previous configuration. If you remove them from the cluster, they will not 
revert to their old, private configs.
Next, we count the number of exceptional machines. If there is only one, it should receive a few extra 
machine level settings and you will not need to create an extra group for it. Join it to the cluster and begin 
copying settings down to the machine level. If this machine is an existing production machine you must 
back up the configuration and consider the changes to mail processing as above.
If there are two or more, as in our example, decide if those two will share any settings with each other 
that are not shared with the cluster. In that case, you will be creating one or more groups for them. 
Otherwise, you will make machine level settings for each, and do not need to have extra groups.
In our case we want to run 
clusterconfig
 from the CLI on any of the machines already in the cluster, 
and select ADDGROUP. We will do this twice, once for Paris and once for Rome.
Now you can begin using the GUI and CLI to build configuration settings for the cluster and for ALL 
the groups, even if the groups have no machines in them yet. You will only be able to create machine 
specific settings for machines after they have joined the cluster.
The best way to create your override or exceptional settings is to copy the settings from the higher (e.g. 
cluster) level down to a lower (e.g. group) level.
For example, after creating the cluster our 
dnsconfig
 settings initially looked like this:
Configured at mode:
Cluster: Yes
Group Main_Group: No
Group Paris: No
Group Rome: No
Machine lab2.cable.nu: No
If we "Copy to Group" the DNS settings, it will look like this:
Configured at mode:
Cluster: Yes
Group Main_Group: No
Group Paris: Yes