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12-2
Cisco NAC Guest Server Installation and Configuration Guide
OL-15986-01
Chapter 12 Replication and High Availability
Setting up replication
Step 1 Create a backup of the Cisco NAC Guest Server before starting by following the Taking a snapshot
instructions in Configuring Backup Settings, page 11-2.
Step 2 From the administration interface select Authentication > Replication Settings from the left hand menu
(
Figure 12-1).
Figure 12-1 Replication Settings
Step 3 Enter the Remote Guest Server address. This is the address of the Cisco NAC Guest Server that you
want to enable replication with.
Step 4 Enter a Shared Secret and confirm it. The shared secret is used to authenticate with the other Cisco NAC
Guest Server. The shared secret must be identical on both Guest Servers.
Step 5 Set the Replication Mode to be On.
NoteSetting a servers Replication Mode to be Off removes it from the replication process. There is no
method of re-synchronizing a Server without starting the process from the beginning and by
doing this you will loose non-replicated data on one of the Servers. Only turn Replication off if
you are making a standalone system.
Step 6 Turning on replication enables you to specify whether this server is the one that contains the current data
or will copy data from the other server. Choose This node contains the data if you want to keep the data
from this server. Choose This node will copy data from other node if you want to erase all data on this
server and copy the data from the other server.
Warning
Make sure you set these correctly on each server otherwise you will loose data. It is advised to take
a backup before running this procedure.
Step 7 Click Save Settings to save the settings and turn on the replication process.
Step 8 Repeat Step 1 through Step 7 to set up replication on the other Cisco NAC Guest Server.