Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 396
System Log, Control Plane Redundancy, Control-Plane Failover
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• 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 buffer, all terminal lines, the console, and optionally to a syslog server. For more information about event messages and configurable 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 configure redundancy features, use the following commands. Table 34. Commands to configure Control Plane redundancy Command Description redundancy auto-failoverlimit redundancy primary (rpm0 | rpm1) redundancy disable-autoreboot pe all Limits the number of failovers for a specific period. Select preferred RPM as primary. Prevents all the PEs from automatically rebooting when the switch fails. redundancy disable-autoreboot pe id stack-unit redundancy disable-autoreboot show redundancy Prevents all the PEs in a stack from automatically rebooting when the switch fails. Prevents the system from automatically rebooting when the switch fails. Displays the current redundancy configuration. 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. To display the reason for the last control-plane failover on the chassis, enter the show redundancy command in EXEC Privilege mode. Dell# show redundancy -- RPM Status -- RPM Slot ID: 0 Control Plane Redundancy Role: Primary RPM State: Active RPM SW Version: 1-0(0-4095) High Availability (HA) 396
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