If you have multiple LDAP directories, you can configure directories for failover. To enable failover, enter LDAP server IP addresses and port numbers in the LDAP Server field as a space-delimited list of LDAP server addresses. You can specify a unique port for each server. If your LDAP servers are running on a non-standard port (389 for non SSL/ 636 for SSL), append the port number to the last server IP address using a ':' as a delimiter. For example, if your servers are running on ports 511 and 512, you can enter the following:
123.123.12.11:511 123.123.12.22:512
If the LDAP server 123.123.12.11 on port 511 did not respond to a request, the request is automatically passed to 123.123.12.22 on port 512.
If all of your LDAP servers are running on the same port, you can append the port number to the last server in the sequence. For example, if all of your servers are running on port 511, you can enter the following:
123.123.12.11 123.123.12.22:511
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