Fault Recovery - Dell Force10 Z9000 Configuration Manual

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 above).
RPM Down, RPM Failover—Master and standby 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, and the sampling process continues after the chassis returns to operation.
Platform Adaptation—RMON supports all Dell Force10 chassis and all Dell Force10 Ethernet
Interfaces.
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