API 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 configuration 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 buffer, all terminal lines, the console, and optionally to a syslog
server. For more information about event messages and configurable 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 traffic. Existing entries are simply shuffled 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 configuring ACLs, refer to Access Control Lists (ACLs).
High Availability (HA)
293