DELL S50V User Manual

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Remote Monitoring
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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. 
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.
Note: A Network Management System (NMS) should be ready to interpret a down interface 
and plot the interface performance graph accordingly.