Users Guide

Core Dumps
A core dump is the contents of RAM a program uses at the time of a software exception and identies the cause of the exception.
There are two types of core dumps: application and kernel.
• Kernel core dump — the central component of an OS that manages system processors and memory allocation and makes these
facilities available to applications. A kernel core dump is the contents of the memory the kernel uses at the time of an exception.
• Application core dump — the contents of the memory allocated to a failed application at the time of an exception.
System Log
Event messages provide system administrators diagnostics and auditing information.
The Dell Networking OS sends event messages to the internal buer, all terminal lines, the console, and optionally to a syslog server. For
more information about event messages and congurable options, see Switch Management.
Control Plane Redundancy
The switch eliminates single points of failure by providing dedicated or load-balanced redundancy for various components.
To congure redundancy features, use the following commands.
Table 35. Commands to
congure Control Plane redundancy
Command Description
redundancy auto-failover-
limit
Limits the number of failovers for a specic period.
redundancy primary (rpm0
| rpm1)
Select preferred RPM as primary.
redundancy disable-auto-
reboot pe all
Prevents all the PEs from automatically rebooting when the switch fails.
redundancy disable-auto-
reboot pe id stack-unit
Prevents all the PEs in a stack from automatically rebooting when the switch fails.
redundancy disable-auto-
reboot
Prevents the system from automatically rebooting when the switch fails.
show redundancy
Displays the current redundancy conguration.
Control-Plane Failover
Control-plane failover is the process of the standby RPM becoming the primary RPM.
The system automatically fails over to the standby RPM when:
1 Communication is lost between the standby and primary RPM.
2 You remove the primary RPM.
You can perform a manual failover by entering the redundancy force-failover rpm command.
High Availability (HA)
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