Users Guide

Remote Monitoring (RMON)
RMON is an industry-standard implementation that monitors network traffic by sharing network monitoring information. RMON provides
both 32-bit and 64-bit monitoring facility and long-term statistics collection on Dell Networking Ethernet interfaces.
RMON operates with the simple network management protocol (SNMP) and monitors all nodes on a local area network (LAN) segment.
RMON monitors traffic passing through the router and segment traffic not destined for the router. The monitored interfaces may be
chosen by using alarms and events with standard management information bases (MIBs).
Topics:
• Implementation Information
• Fault Recovery
Implementation Information
Configure SNMP prior to setting up RMON.
For a complete SNMP implementation description, refer to Simple Network Management Protocol (SNMP).
Configuring RMON requires using the RMON CLI and includes the following tasks:
• Setting the rmon Alarm
• Configuring an RMON Event
• Configuring RMON Collection Statistics
• Configuring the RMON Collection History
RMON implements the following standard request for comments (RFCs) (for more information, refer to the Standards Compliance
chapter).
• RFC-2819
• RFC-3273
• RFC-3434
• RFC-4502
Fault Recovery
RMON provides the following fault recovery functions.
• Interface Down — When an RMON-enabled interface goes down, monitoring continues. However, all data values are registered as
0xFFFFFFFF (32 bits) or ixFFFFFFFFFFFFFFFF (64 bits). When the interface comes back up, RMON monitoring processes resumes.
NOTE:
A network management system (NMS) should be ready to interpret a down interface and plot the interface
performance graph accordingly.
• Device Down — When a device goes down, all sampled data is lost. But the RMON configurations are saved in the configuration file.
The sampling process continues after the chassis returns to operation.
• Platform Adaptation — RMON supports all Dell Networking chassis and all Dell Networking Ethernet interfaces.
Setting the RMON Alarm
To set an alarm on any MIB object, use the rmon alarm or rmon hc-alarm command in GLOBAL CONFIGURATION mode.
• Set an alarm on any MIB object.
CONFIGURATION mode
[no] rmon alarm number variable interval {delta | absolute} rising-threshold [value event-
number] falling-threshold value event-number [owner string]
OR
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