User manual

SM User Manual January 2004
Software Release 4.1
4.7.5 SNMP Commands
To manage a module, SNMPv2 supports the set command, which instructs the agent to change
the data that manages the module.
To monitor a network element (Canopy module), SNMPv2 supports
• the get command, which instructs the agent to send information about the module to
the manager in the NMS.
• traversal operations, which the manager uses to identify supported objects and to
format information about those objects into relational tables.
In a typical Canopy network, the manager issues these commands to the agents of more than one
module (to all SMs in the operator network, for example).
4.7.6 Traps
When a specified event occurs in the module, the agent initiates a trap, for which the agent sends
an unsolicited asynchronous message to the manager.
4.7.7 MIBS
The MIB, the SNMP-defined data structure, is a tree of standard branches that lead to optional,
non-standard positions in the data hierarchy. The MIB contains both
• objects that SNMP is allowed to control (bandwidth allocation or access, for example)
• objects that SNMP is allowed to monitor (packet transfer, bit rate, and error data, for
example).
The path to each object in the MIB is unique to the object. The endpoint of the path is the object
identifier.
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