the manager software, and result in a response by the agent.
The third operation type, the TRAP, allows the agent to send an
unsolicited message to the manager. This operation is typically
used as an alert to a potential problem, or a change in device
status.
MIB Objects
A number of different MIB specifications have been defined for
managing network equipment; some are standard, others are
proprietary. SNMP-compliant devices typically support one or
more standard MIBs defined by the IETF, in the form of Request
for Comments (RFC) documents. These allow for a common
method of managing devices, such as bridges and hubs, and
network interfaces, such as Ethernet and Token Ring.
The main standard MIB, referred to as MIB II, provides an over-
all view of the managed agent and is supported, at least in part,
by all SNMP agents. In addition, proprietary MIB extensions are
defined by commercial vendors for managing device-specific
functions of their products.
The standards supported by the TigerSwitch 100 units include:
• RFC 1493 - Definitions of Managed Objects for Bridges
• RFC 1213 - Simple Network Management Protocol
5-3
MANAGEMENT VIA SNMP