Compatibility requirements
- System resources – Both systems must have similar memory, CPU, and disk space. Both systems must also have the same disk partitions, which are set during initial install and are identified internally by a partition number.
- FIPS mode – Both systems must have the same FIPS mode configured. FIPS mode cannot be changed when HA is configured.
- SMS certificate key – Both systems must have compatible SMS certificate key sizes. For example, the active SMS cannot be running a 1K key and the passive SMS be running a 2K key. You cannot install the 2K key in either SMS while the SMS is running in HA. To install a 2K key, disable the cluster, install the 2K key on each SMS, and then reconfigure the cluster. A 2K key is required on both systems if HA is configured in FIPS mode.
- SNMP – You cannot modify SNMP settings for the passive SMS server after you configure SMS HA. If you use SNMP to monitor and manage your SMS servers, you must configure the SMS's connectivity to an SNMP server before you configure the SMS HA cluster. To modify SNMP settings, disable the cluster, modify the SNMP settings on both servers separately, and then reconfigure the cluster.
Unsupported features
- IPv6 – SMS HA is not supported with IPv6. If the SMS is IPv6 only, the HA configuration button shows an error when selected.
- External database replication – External database replication and SMS HA features both leverage the same functionality in the underlying database. The SMS database does not support replication to multiple destinations; therefore, Trend does not recommend using SMS HA and external database replication at the same time.