Simple Network Management Protocol (SNMP) is an application-layer protocol that monitors network devices for conditions that warrant administrative attention. Items typically monitored include servers, workstations, routers, switches and hubs. You can configure SMS to be a managed device that is monitored by an SNMP server. The SNMP server periodically requests information from the SMS server. You can also configure SMS to send trap information to the SNMP server.
Security Management System High Availability (SMS HA) The SMS can be configured to operate in a two-node cluster (active/passive), increasing the availability of the SMS server should an unexpected event cause one of the nodes to fail or become inaccessible. The redundant (passive) SMS is configured, synchronized with the active system, and then waits in a standby mode, monitoring the health of the active system. Should the health or communications check fail, this passive SMS will start up and attempt to take over the HA resources.
By default, only the "Active" SMS can be configured to respond to SNMP queries. However, the "Passive" SMS can be configured to respond to SNMP queries if you configure the SNMP service on the "Passive" SMS prior to configuring the HA pair. If SNMP is enabled, the SMS will respond regardless of the HA state (be it configured, active or passive). The SNMP setting is managed independently on each SMS in an HA pair.