Remote Monitoring (Rmon); Implementation Information; Fault Recovery - Dell Force10 Z9000 Configuration Manual

Remote Monitoring (RMON)

Remote monitoring (RMON) is supported on Dell Networking OS.
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).

Implementation Information

Configure SNMP prior to setting up RMON.
For a complete SNMP implementation description, refer to
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
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 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.
Simple Network Management Protocol
40
(SNMP).
Standards Compliance
Remote Monitoring (RMON)
615