Architecture
Attached to the FOXMAN-UN is an SNMP proxy agent which will be the proxy for all network elements FOXMAN-UN is managing. The proxy agent for FOXMAN-UN is a process that communicates with the FOXMAN-UN database for Fault and Configuration management of FOX61x and FOX51x NEs. Propagation of traps is done over a configurable trap port on the HLM station (the standard SNMP trap port is 162, the default trap port in the «$NEM_HOME/etc/snmpagentd.conf» is set to 10162) using UDP datagrams. For Configuration Management the proxy-agent will listen to a configurable UDP port (the standard SNMP trap is 161, the default request port in the snmpagentd.conf is set to 10161).
The SNMP daemon of FOXMAN-UN implements the Internet Standard SNMP V3. For V1, V2c and V3 the «Get» and «GetNext» request commands are supported. Additionally the «GetBulk» request command is included for V2c and V3.
The FOXMAN-UN database contains the logical objects to be managed and these objects are synchronized with the physical network element by the use of the FOXMAN-UN Element Agents which use a polling based approach to query managed network elements. The SNMP proxy agent will propagate the corresponding SNMP traps when one of the following events occur on the logical Network Element Objects in the FOXMAN-UN database (the Trap Variables are given in the attached MIB):
• When a new alarm is raised on a network element.
• When an outstanding alarm is cleared.
• When an outstanding or cleared alarm is acknowledged.
• When a network element is added to the FOXMAN-UN database
• When an existing network element is deleted from the FOXMAN-UN database.
• When a new unit is added to a network element.
• When an existing unit in a network element is deleted
• When the name of a network element is modified.
• When the operational state of a network element is modified.
• When the polling status of a network element is modified.