Service Manual

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Remote Monitoring (RMON)
Remote monitoring (RMON) is supported on Dell Networking OS.
RMON is an industry-standard implementation that monitors network trac 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 trac passing through the router and segment trac not destined for the router. The monitored
interfaces may be chosen by using alarms and events with standard management information bases (MIBs).
Implementation Information
Congure SNMP prior to setting up RMON.
For a complete SNMP implementation description, refer to Simple Network Management Protocol (SNMP).
Conguring RMON requires using the RMON CLI and includes the following tasks:
• Setting the rmon Alarm
• Conguring an RMON Event
• Conguring RMON Collection Statistics
• Conguring 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.
• Line Card Down — The same as Interface Down (see previous).
• RPM Down, RPM Failover — Master and standby route processor modules (RPMs) run the RMON sampling process in the
background. Therefore, when an RPM goes down, the other RPM maintains the sampled data — the new master RPM provides
the same sampled data as did the old master — as long as the master RPM had been running long enough to sample all the
data. NMS backs up all the long-term data collection and displays the failover downtime from the performance graph.
• Chassis Down — When a chassis goes down, all sampled data is lost. But the RMON congurations are saved in the
conguration le. The sampling process continues after the chassis returns to operation.
• Platform Adaptation — RMON supports all Dell Networking chassis and all Dell Networking Ethernet interfaces.
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Remote Monitoring (RMON)