Concept Guide
• Crash Log — contains trace messages related to IPC and IRC timeouts and task crashes on line cards and is stored under the directory
CRASH_LOG_DIR.
For more information about trace logs and conguration options, refer to S-Series Debugging and Diagnostics.
Core Dumps
A core dump is the contents of RAM a program uses at the time of a software exception and is used to identify the cause of the exception.
There are two types of core dumps: application and kernel.
• Application core dump is the contents of the memory allocated to a failed application at the time of an exception.
• Kernel core dump is the central component of an operating system that manages system processors and memory allocation and makes
these facilities available to applications. A kernel core dump is the contents of the memory in use by the kernel at the time of an
exception.
System Log
Event messages provide system administrators diagnostics and auditing information.
Dell EMC Networking OS sends event messages to the internal buer, all terminal lines, the console, and optionally to a syslog server. For
more information about event messages and congurable options, refer to Management.
Hot-Lock Behavior
Dell EMC Networking OS hot-lock features allow you to append and delete their corresponding content addressable memory (CAM) entries
dynamically without disrupting trac. Existing entries are simply shued to accommodate new entries.
Hot-Lock IP ACLs allows you to append rules to and delete rules from an access control list (ACL) that is already written to CAM. This
behavior is enabled by default and is available for both standard and extended ACLs on ingress and egress. For information about
conguring ACLs, refer to Access Control Lists (ACLs).
High Availability (HA)
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