
SNMP & RMON Management
This chapter describes the switch’s Simple Network Management Protocol (SNMP) and Remote Monitoring
(RMON) capabilities.
Overview
RMON is an abbreviation for the Remote Monitoring MIB (Management Information Base). RMON is a system
defined by the Internet Engineering Task Force (IETF) document RFC 1757, which defines how networks can be
monitored remotely.
RMONs typically consist of two components: an RMON probe and a management workstation:
- The RMON probe is an intelligent device or software agent that continually collects statistics about a LAN segment or VLAN. The
RMON probe transfers the collected data to a management workstation on request or when a pre-defined threshold is reached.
- The management workstation collects the statistics that the RMON probe gathers. The workstation can reside on the same
network as the probe, or it can have an in-band or out-of-band connection to the probe.
The switch provides RMON capabilities that allow network administrators to set parameters and view statistical
counters defined in MIB-II, Bridge MIB, and RMON MIB. RMON activities are performed at a Network
Management Station running an SNMP network management application with graphical user interface.
SNMP Agent and MIB-2 (RFC 1213)
The SNMP Agent running on the switch manager CPU is responsible for:
- Retrieving MIB counters from various layers of software modules according to the SNMP GET/GET NEXT frame messages.
- Setting MIB variables according to the SNMP SET frame message.
- Generating an SNMP TRAP frame message to the Network Management Station if the threshold of a certain MIB counter is
reached or if other trap conditions (such as the following) are met:
WARM START
COLD START
LINK UP
LINK DOWN
AUTHENTICATION FAILURE
RISING ALARM
FALLING ALARM
TOPOLOGY ALARM
MIB-II defines a set of manageable objects in various layers of the TCP/IP protocol suites. MIB-II covers all
manageable objects from layer 1 to layer 4, and, as a result, is the major SNMP MIB supported by all vendors in the
networking industry. The switch supports a complete implementation of SNMP Agent and MIB-II.
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