After you have used SMIT menus or commands to enter extension node information into the SDR, the SP SNMP Manager running on the control workstation allows the transfer of extension node configuration information to the SNMP Agent running on the extension node.
See Understanding network management for a high-level overview of Simple Network Management Protocol (SNMP).
The SP SNMP Manager daemon, spmgrd, runs on the control workstation and treats each extension node as a managed node, with a corresponding SNMP Agent. The SP SNMP Manager waits for trap messages from extension node SNMP Agents reporting state changes or requesting configuration information and sends configuration information to the SNMP Agents when requested. For more information on spmgrd, See the book PSSP: Command and Technical Reference.
An SNMP Agent may be responsible for one or several extension nodes attached to the SP Switch. The SNMP Agent maintains configuration information for each of its extension nodes in the SNMP Management Information Base (MIB). When an SNMP Agent needs configuration information for one of its extension nodes, it sends a trap message to the SP SNMP Manager responsible for that extension node. The SP SNMP Manager extracts the requested information from the SDR and sends it to the SNMP Agent.
See ibmSPDepNode.my for a copy of the MIB for dependent nodes.